diff --git a/internal/handler/task_handler.go b/internal/handler/task_handler.go
new file mode 100644
index 0000000..d5027be
--- /dev/null
+++ b/internal/handler/task_handler.go
@@ -0,0 +1,98 @@
+package handler
+
+import (
+	"context"
+	"strings"
+
+	"gcy_hpc_server/internal/model"
+	"gcy_hpc_server/internal/server"
+
+	"github.com/gin-gonic/gin"
+	"go.uber.org/zap"
+)
+
+type taskServiceProvider interface {
+	SubmitAsync(ctx context.Context, req *model.CreateTaskRequest) (int64, error)
+	ListTasks(ctx context.Context, query *model.TaskListQuery) ([]model.Task, int64, error)
+}
+
+type TaskHandler struct {
+	svc    taskServiceProvider
+	logger *zap.Logger
+}
+
+func NewTaskHandler(svc taskServiceProvider, logger *zap.Logger) *TaskHandler {
+	return &TaskHandler{svc: svc, logger: logger}
+}
+
+func (h *TaskHandler) CreateTask(c *gin.Context) {
+	var req model.CreateTaskRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		h.logger.Warn("invalid request body for create task", zap.Error(err))
+		server.BadRequest(c, err.Error())
+		return
+	}
+
+	taskID, err := h.svc.SubmitAsync(c.Request.Context(), &req)
+	if err != nil {
+		errStr := err.Error()
+		if strings.Contains(errStr, "not found") {
+			h.logger.Warn("task submit target not found", zap.Error(err))
+			server.NotFound(c, errStr)
+			return
+		}
+		if strings.Contains(errStr, "exceeds limit") || strings.Contains(errStr, "validation") {
+			h.logger.Warn("task submit validation failed", zap.Error(err))
+			server.BadRequest(c, errStr)
+			return
+		}
+		h.logger.Error("failed to create task", zap.Error(err))
+		server.InternalError(c, errStr)
+		return
+	}
+
+	h.logger.Info("task created", zap.Int64("id", taskID))
+	server.Created(c, gin.H{"id": taskID})
+}
+
+func (h *TaskHandler) ListTasks(c *gin.Context) {
+	var query model.TaskListQuery
+	_ = c.ShouldBindQuery(&query)
+
+	if query.Page < 1 {
+		query.Page = 1
+	}
+	if query.PageSize < 1 || query.PageSize > 100 {
+		query.PageSize = 10
+	}
+
+	tasks, total, err := h.svc.ListTasks(c.Request.Context(), &query)
+	if err != nil {
+		h.logger.Error("failed to list tasks", zap.Error(err))
+		server.InternalError(c, err.Error())
+		return
+	}
+
+	responses := make([]model.TaskResponse, 0, len(tasks))
+	for i := range tasks {
+		responses = append(responses, model.TaskResponse{
+			ID:           tasks[i].ID,
+			TaskName:     tasks[i].TaskName,
+			AppID:        tasks[i].AppID,
+			AppName:      tasks[i].AppName,
+			Status:       tasks[i].Status,
+			CurrentStep:  tasks[i].CurrentStep,
+			RetryCount:   tasks[i].RetryCount,
+			SlurmJobID:   tasks[i].SlurmJobID,
+			WorkDir:      tasks[i].WorkDir,
+			ErrorMessage: tasks[i].ErrorMessage,
+			CreatedAt:    tasks[i].CreatedAt,
+			UpdatedAt:    tasks[i].UpdatedAt,
+		})
+	}
+
+	server.OK(c, model.TaskListResponse{
+		Items: responses,
+		Total: total,
+	})
+}
diff --git a/internal/handler/task_handler_test.go b/internal/handler/task_handler_test.go
new file mode 100644
index 0000000..166f81a
--- /dev/null
+++ b/internal/handler/task_handler_test.go
@@ -0,0 +1,286 @@
+package handler
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"path/filepath"
+	"sync/atomic"
+	"testing"
+	"time"
+
+	"gcy_hpc_server/internal/model"
+	"gcy_hpc_server/internal/service"
+	"gcy_hpc_server/internal/slurm"
+	"gcy_hpc_server/internal/store"
+
+	"github.com/gin-gonic/gin"
+	"go.uber.org/zap"
+	"gorm.io/driver/sqlite"
+	"gorm.io/gorm"
+	gormlogger "gorm.io/gorm/logger"
+)
+
+var taskDBCounter atomic.Int64
+
+func setupTaskHandler(t *testing.T, slurmSrv *httptest.Server) (*TaskHandler, *gorm.DB) {
+	t.Helper()
+	dbFile := filepath.Join(t.TempDir(), fmt.Sprintf("test-%d.db", taskDBCounter.Add(1)))
+	db, err := gorm.Open(sqlite.Open(dbFile), &gorm.Config{Logger: gormlogger.Default.LogMode(gormlogger.Silent)})
+	if err != nil {
+		t.Fatalf("open db: %v", err)
+	}
+	db.AutoMigrate(&model.Task{}, &model.Application{})
+	t.Cleanup(func() { os.Remove(dbFile) })
+
+	taskStore := store.NewTaskStore(db)
+	appStore := store.NewApplicationStore(db)
+
+	var jobSvc *service.JobService
+	if slurmSrv != nil {
+		client, _ := slurm.NewClient(slurmSrv.URL, slurmSrv.Client())
+		jobSvc = service.NewJobService(client, zap.NewNop())
+	}
+
+	workDir := filepath.Join(t.TempDir(), "work")
+	taskSvc := service.NewTaskService(taskStore, appStore, nil, nil, nil, jobSvc, workDir, zap.NewNop())
+	h := NewTaskHandler(taskSvc, zap.NewNop())
+	return h, db
+}
+
+func setupTaskRouter(h *TaskHandler) *gin.Engine {
+	gin.SetMode(gin.TestMode)
+	r := gin.New()
+	v1 := r.Group("/api/v1")
+	tasks := v1.Group("/tasks")
+	tasks.POST("", h.CreateTask)
+	tasks.GET("", h.ListTasks)
+	return r
+}
+
+func createTestAppForTask(db *gorm.DB) int64 {
+	app := &model.Application{
+		Name:           "test-app",
+		ScriptTemplate: "#!/bin/bash\necho hello",
+		Parameters:     json.RawMessage(`[]`),
+	}
+	db.Create(app)
+	return app.ID
+}
+
+// ---- CreateTask Tests ----
+
+func TestTaskHandler_CreateTask_Success(t *testing.T) {
+	slurmSrv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusCreated)
+		json.NewEncoder(w).Encode(map[string]interface{}{"job_id": 12345})
+	}))
+	defer slurmSrv.Close()
+
+	h, db := setupTaskHandler(t, slurmSrv)
+	r := setupTaskRouter(h)
+
+	appID := createTestAppForTask(db)
+
+	taskSvc := h.svc.(*service.TaskService)
+	ctx := context.Background()
+	taskSvc.StartProcessor(ctx)
+	defer taskSvc.StopProcessor()
+
+	body, _ := json.Marshal(model.CreateTaskRequest{
+		AppID:    appID,
+		TaskName: "my-task",
+	})
+	w := httptest.NewRecorder()
+	req, _ := http.NewRequest(http.MethodPost, "/api/v1/tasks", bytes.NewReader(body))
+	req.Header.Set("Content-Type", "application/json")
+	r.ServeHTTP(w, req)
+
+	if w.Code != http.StatusCreated {
+		t.Fatalf("expected 201, got %d: %s", w.Code, w.Body.String())
+	}
+	var resp map[string]interface{}
+	json.Unmarshal(w.Body.Bytes(), &resp)
+	if !resp["success"].(bool) {
+		t.Fatal("expected success=true")
+	}
+	data := resp["data"].(map[string]interface{})
+	if _, ok := data["id"]; !ok {
+		t.Fatal("expected id in response data")
+	}
+}
+
+func TestTaskHandler_CreateTask_MissingAppID(t *testing.T) {
+	h, _ := setupTaskHandler(t, nil)
+	r := setupTaskRouter(h)
+
+	body := `{"task_name":"no-app"}`
+	w := httptest.NewRecorder()
+	req, _ := http.NewRequest(http.MethodPost, "/api/v1/tasks", bytes.NewReader([]byte(body)))
+	req.Header.Set("Content-Type", "application/json")
+	r.ServeHTTP(w, req)
+
+	if w.Code != http.StatusBadRequest {
+		t.Fatalf("expected 400, got %d: %s", w.Code, w.Body.String())
+	}
+}
+
+func TestTaskHandler_CreateTask_InvalidJSON(t *testing.T) {
+	h, _ := setupTaskHandler(t, nil)
+	r := setupTaskRouter(h)
+
+	w := httptest.NewRecorder()
+	req, _ := http.NewRequest(http.MethodPost, "/api/v1/tasks", bytes.NewReader([]byte("not-json")))
+	req.Header.Set("Content-Type", "application/json")
+	r.ServeHTTP(w, req)
+
+	if w.Code != http.StatusBadRequest {
+		t.Fatalf("expected 400, got %d: %s", w.Code, w.Body.String())
+	}
+}
+
+// ---- ListTasks Tests ----
+
+func TestTaskHandler_ListTasks_Pagination(t *testing.T) {
+	slurmSrv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusCreated)
+		json.NewEncoder(w).Encode(map[string]interface{}{"job_id": int32(100)})
+	}))
+	defer slurmSrv.Close()
+
+	h, db := setupTaskHandler(t, slurmSrv)
+	r := setupTaskRouter(h)
+
+	appID := createTestAppForTask(db)
+
+	taskSvc := h.svc.(*service.TaskService)
+	ctx := context.Background()
+	taskSvc.StartProcessor(ctx)
+	defer taskSvc.StopProcessor()
+
+	for i := 0; i < 5; i++ {
+		body, _ := json.Marshal(model.CreateTaskRequest{
+			AppID:    appID,
+			TaskName: fmt.Sprintf("task-%d", i),
+		})
+		w := httptest.NewRecorder()
+		req, _ := http.NewRequest(http.MethodPost, "/api/v1/tasks", bytes.NewReader(body))
+		req.Header.Set("Content-Type", "application/json")
+		r.ServeHTTP(w, req)
+	}
+
+	// Wait for async processing
+	time.Sleep(200 * time.Millisecond)
+
+	w := httptest.NewRecorder()
+	req, _ := http.NewRequest(http.MethodGet, "/api/v1/tasks?page=1&page_size=3", nil)
+	r.ServeHTTP(w, req)
+
+	if w.Code != http.StatusOK {
+		t.Fatalf("expected 200, got %d: %s", w.Code, w.Body.String())
+	}
+	var resp map[string]interface{}
+	json.Unmarshal(w.Body.Bytes(), &resp)
+	data := resp["data"].(map[string]interface{})
+	if data["total"].(float64) != 5 {
+		t.Fatalf("expected total=5, got %v", data["total"])
+	}
+	items := data["items"].([]interface{})
+	if len(items) != 3 {
+		t.Fatalf("expected 3 items, got %d", len(items))
+	}
+}
+
+func TestTaskHandler_ListTasks_StatusFilter(t *testing.T) {
+	slurmSrv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusCreated)
+		json.NewEncoder(w).Encode(map[string]interface{}{"job_id": int32(200)})
+	}))
+	defer slurmSrv.Close()
+
+	h, db := setupTaskHandler(t, slurmSrv)
+	r := setupTaskRouter(h)
+
+	appID := createTestAppForTask(db)
+
+	taskSvc := h.svc.(*service.TaskService)
+	ctx := context.Background()
+	taskSvc.StartProcessor(ctx)
+	defer taskSvc.StopProcessor()
+
+	for i := 0; i < 3; i++ {
+		body, _ := json.Marshal(model.CreateTaskRequest{
+			AppID:    appID,
+			TaskName: fmt.Sprintf("filter-task-%d", i),
+		})
+		w := httptest.NewRecorder()
+		req, _ := http.NewRequest(http.MethodPost, "/api/v1/tasks", bytes.NewReader(body))
+		req.Header.Set("Content-Type", "application/json")
+		r.ServeHTTP(w, req)
+	}
+
+	// Wait for async processing
+	time.Sleep(200 * time.Millisecond)
+
+	w := httptest.NewRecorder()
+	req, _ := http.NewRequest(http.MethodGet, "/api/v1/tasks?status=queued", nil)
+	r.ServeHTTP(w, req)
+
+	if w.Code != http.StatusOK {
+		t.Fatalf("expected 200, got %d: %s", w.Code, w.Body.String())
+	}
+	var resp map[string]interface{}
+	json.Unmarshal(w.Body.Bytes(), &resp)
+	data := resp["data"].(map[string]interface{})
+	items := data["items"].([]interface{})
+	for _, item := range items {
+		m := item.(map[string]interface{})
+		if m["status"] != "queued" {
+			t.Fatalf("expected status=queued, got %v", m["status"])
+		}
+	}
+}
+
+func TestTaskHandler_ListTasks_DefaultPagination(t *testing.T) {
+	h, db := setupTaskHandler(t, nil)
+	r := setupTaskRouter(h)
+
+	_ = createTestAppForTask(db)
+
+	// Directly insert tasks via DB to avoid needing processor
+	for i := 0; i < 15; i++ {
+		task := &model.Task{
+			TaskName:    fmt.Sprintf("default-task-%d", i),
+			AppID:       1,
+			AppName:     "test-app",
+			Status:      model.TaskStatusSubmitted,
+			SubmittedAt: time.Now(),
+		}
+		db.Create(task)
+	}
+
+	w := httptest.NewRecorder()
+	req, _ := http.NewRequest(http.MethodGet, "/api/v1/tasks", nil)
+	r.ServeHTTP(w, req)
+
+	if w.Code != http.StatusOK {
+		t.Fatalf("expected 200, got %d: %s", w.Code, w.Body.String())
+	}
+	var resp map[string]interface{}
+	json.Unmarshal(w.Body.Bytes(), &resp)
+	data := resp["data"].(map[string]interface{})
+	if data["total"].(float64) != 15 {
+		t.Fatalf("expected total=15, got %v", data["total"])
+	}
+	items := data["items"].([]interface{})
+	if len(items) != 10 {
+		t.Fatalf("expected 10 items (default page_size), got %d", len(items))
+	}
+}
diff --git a/internal/server/server.go b/internal/server/server.go
index ab1cb46..e74c119 100644
--- a/internal/server/server.go
+++ b/internal/server/server.go
@@ -56,8 +56,13 @@ type FolderHandler interface {
 	DeleteFolder(c *gin.Context)
 }
 
+type TaskHandler interface {
+	CreateTask(c *gin.Context)
+	ListTasks(c *gin.Context)
+}
+
 // NewRouter creates a Gin engine with all API v1 routes registered with real handlers.
-func NewRouter(jobH JobHandler, clusterH ClusterHandler, appH ApplicationHandler, uploadH UploadHandler, fileH FileHandler, folderH FolderHandler, logger *zap.Logger) *gin.Engine {
+func NewRouter(jobH JobHandler, clusterH ClusterHandler, appH ApplicationHandler, uploadH UploadHandler, fileH FileHandler, folderH FolderHandler, taskH TaskHandler, logger *zap.Logger) *gin.Engine {
 	gin.SetMode(gin.ReleaseMode)
 	r := gin.New()
 	r.Use(gin.Recovery())
@@ -116,6 +121,14 @@ func NewRouter(jobH JobHandler, clusterH ClusterHandler, appH ApplicationHandler
 		folders.DELETE("/:id", folderH.DeleteFolder)
 	}
 
+	if taskH != nil {
+		tasks := v1.Group("/tasks")
+		{
+			tasks.POST("", taskH.CreateTask)
+			tasks.GET("", taskH.ListTasks)
+		}
+	}
+
 	return r
 }
 
@@ -172,6 +185,9 @@ func registerPlaceholderRoutes(v1 *gin.RouterGroup) {
 	folders.GET("", notImplemented)
 	folders.GET("/:id", notImplemented)
 	folders.DELETE("/:id", notImplemented)
+
+	v1.POST("/tasks", notImplemented)
+	v1.GET("/tasks", notImplemented)
 }
 
 func notImplemented(c *gin.Context) {