可以单独做一个Form,放一个Image设定
Form2.WindowsState:=wsMaximized;
Image1.Align:=alClient;
Image1可以这样赋值 Image1.Picture.Assign(Image.Picture);var 
MouseDownPoint,MouseMovePoint :TPoint;
IsMouseDown :Boolean;procedure TForm2.Image1MouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
if Button=mbLeft then
 begin
  IsMouseDown :=True;
  MouseDownPoint :=Point(x,y);
 end;
end;procedure TForm2.Image1MouseMove(Sender: TObject; Shift: TShiftState; X,
  Y: Integer);
begin
if IsMouseDown then 
begin 
MouseMovePoint :=Point(x,y);
Form2.HorzScrollBar.Position:=Form2.HorzScrollBar.Position+MouseDownPoint.x-MouseMovePoint.x;
Form2.VertScrollBar.Position :=Form2.VertScrollBar.Position+MouseDownPoint.y-MouseMovePoint.y;
end; 
end;procedure TForm2.Image1MouseUp(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
IsMouseDown :=False;
end;