diff --git a/proxmox/qemu.go b/proxmox/qemu.go
index 4c496bd..8a51c0b 100644
--- a/proxmox/qemu.go
+++ b/proxmox/qemu.go
@@ -12,6 +12,7 @@ import (
 )
 
 type VirtualMachine struct {
+	service    *Service
 	restclient *rest.RESTClient
 	Node       string
 	VM         *api.VirtualMachine
@@ -52,11 +53,22 @@ func (s *Service) VirtualMachine(ctx context.Context, vmid int) (*VirtualMachine
 			}
 			return nil, err
 		}
-		return &VirtualMachine{restclient: s.restclient, VM: vm, Node: node.Node}, nil
+		return &VirtualMachine{service: s, restclient: s.restclient, VM: vm, Node: node.Node}, nil
 	}
 	return nil, rest.NotFoundErr
 }
 
+func (s *Service) CreateVirtualMachine(ctx context.Context, node string, vmid int, option api.VirtualMachineCreateOptions) (*VirtualMachine, error) {
+	taskid, err := s.restclient.CreateVirtualMachine(ctx, node, vmid, option)
+	if err != nil {
+		return nil, err
+	}
+	if err := s.EnsureTaskDone(ctx, node, *taskid); err != nil {
+		return nil, err
+	}
+	return s.VirtualMachine(ctx, vmid)
+}
+
 func (s *Service) VirtualMachineFromUUID(ctx context.Context, uuid string) (*VirtualMachine, error) {
 	nodes, err := s.Nodes(ctx)
 	if err != nil {
@@ -72,19 +84,19 @@ func (s *Service) VirtualMachineFromUUID(ctx context.Context, uuid string) (*Vir
 			if err != nil {
 				return nil, err
 			}
-			vmuuid, err := convertSMBiosToUUID(config.SMBios1)
+			vmuuid, err := ConvertSMBiosToUUID(config.SMBios1)
 			if err != nil {
 				return nil, err
 			}
 			if vmuuid == uuid {
-				return &VirtualMachine{restclient: s.restclient, VM: vm, Node: node.Node, config: config}, nil
+				return &VirtualMachine{service: s, restclient: s.restclient, VM: vm, Node: node.Node, config: config}, nil
 			}
 		}
 	}
 	return nil, rest.NotFoundErr
 }
 
-func convertSMBiosToUUID(smbios string) (string, error) {
+func ConvertSMBiosToUUID(smbios string) (string, error) {
 	re := regexp.MustCompile(fmt.Sprintf("uuid=%s", UUIDFormat))
 	match := re.FindString(smbios)
 	if match == "" {
@@ -94,6 +106,15 @@ func convertSMBiosToUUID(smbios string) (string, error) {
 	return strings.Split(match, "=")[1], nil
 }
 
+func (c *VirtualMachine) Delete(ctx context.Context) error {
+	path := fmt.Sprintf("/nodes/%s/qemu/%d", c.Node, c.VM.VMID)
+	var upid string
+	if err := c.restclient.Delete(ctx, path, nil, &upid); err != nil {
+		return err
+	}
+	return c.service.EnsureTaskDone(ctx, c.Node, upid)
+}
+
 func (c *VirtualMachine) GetConfig(ctx context.Context) (*api.VirtualMachineConfig, error) {
 	if c.config != nil {
 		return c.config, nil
@@ -114,3 +135,46 @@ func (c *VirtualMachine) GetOSInfo(ctx context.Context) (*api.OSInfo, error) {
 	}
 	return osInfo, nil
 }
+
+// size : The new size. With the `+` sign the value is added to the actual size of the volume
+// and without it, the value is taken as an absolute one.
+// Shrinking disk size is not supported.
+// size format : \+?\d+(\.\d+)?[KMGT]?j
+func (c *VirtualMachine) ResizeVolume(ctx context.Context, disk, size string) error {
+	path := fmt.Sprintf("/nodes/%s/qemu/%d/resize", c.Node, c.VM.VMID)
+	request := make(map[string]interface{})
+	request["disk"] = disk
+	request["size"] = size
+	var v interface{}
+	if err := c.restclient.Put(ctx, path, request, &v); err != nil {
+		return err
+	}
+	return nil
+}
+
+func (c *VirtualMachine) Start(ctx context.Context) error {
+	path := fmt.Sprintf("/nodes/%s/qemu/%d/status/start", c.Node, c.VM.VMID)
+	var upid string
+	if err := c.restclient.Post(ctx, path, nil, &upid); err != nil {
+		return err
+	}
+	return c.service.EnsureTaskDone(ctx, c.Node, upid)
+}
+
+func (c *VirtualMachine) Stop(ctx context.Context) error {
+	path := fmt.Sprintf("/nodes/%s/qemu/%d/status/stop", c.Node, c.VM.VMID)
+	var upid string
+	if err := c.restclient.Post(ctx, path, nil, &upid); err != nil {
+		return err
+	}
+	return c.service.EnsureTaskDone(ctx, c.Node, upid)
+}
+
+func (c *VirtualMachine) Resume(ctx context.Context) error {
+	path := fmt.Sprintf("/nodes/%s/qemu/%d/status/resume", c.Node, c.VM.VMID)
+	var upid string
+	if err := c.restclient.Post(ctx, path, nil, &upid); err != nil {
+		return err
+	}
+	return c.service.EnsureTaskDone(ctx, c.Node, upid)
+}
diff --git a/proxmox/storage.go b/proxmox/storage.go
index 6d708c1..31d6b4b 100644
--- a/proxmox/storage.go
+++ b/proxmox/storage.go
@@ -61,3 +61,22 @@ func (s *Storage) GetContent(ctx context.Context, volumeID string) (*api.Storage
 	}
 	return nil, rest.NotFoundErr
 }
+
+func (s *Storage) GetVolume(ctx context.Context, volumeID string) (*api.StorageVolume, error) {
+	path := fmt.Sprintf("/nodes/%s/storage/%s/content/%s", s.Node, s.Storage.Storage, volumeID)
+	var volume *api.StorageVolume
+	if err := s.restclient.Get(ctx, path, &volume); err != nil {
+		return nil, err
+	}
+	return volume, nil
+}
+
+// to do : taskid
+func (s *Storage) DeleteVolume(ctx context.Context, volumeID string) error {
+	path := fmt.Sprintf("/nodes/%s/storage/%s/content/%s", s.Node, s.Storage.Storage, volumeID)
+	var taskid string
+	if err := s.restclient.Delete(ctx, path, nil, &taskid); err != nil {
+		return err
+	}
+	return nil
+}
diff --git a/proxmox/task.go b/proxmox/task.go
new file mode 100644
index 0000000..5cede07
--- /dev/null
+++ b/proxmox/task.go
@@ -0,0 +1,37 @@
+package proxmox
+
+import (
+	"context"
+	"errors"
+	"time"
+
+	"github.com/sp-yduck/proxmox-go/api"
+	"github.com/sp-yduck/proxmox-go/rest"
+)
+
+const (
+	TaskStatusOK = "OK"
+)
+
+func (s *Service) MustGetTask(ctx context.Context, node string, upid string) (*api.Task, error) {
+	for i := 0; i < 10; i++ {
+		task, err := s.restclient.GetTask(ctx, node, upid)
+		if rest.IsNotFound(err) {
+			time.Sleep(time.Second * 1)
+			continue
+		}
+		return task, nil
+	}
+	return nil, errors.New("task wait deadline exceeded")
+}
+
+func (s *Service) EnsureTaskDone(ctx context.Context, node, upid string) error {
+	task, err := s.MustGetTask(ctx, node, upid)
+	if err != nil {
+		return err
+	}
+	if task.Status != TaskStatusOK {
+		return errors.New(task.Status)
+	}
+	return nil
+}