图形设备接口（Graphics Device Interface或Graphical Device Interface，缩写GDI），是微软公司视窗操作系统（Microsoft Windows）的三大核心部件（也称“子系统”）之一。GDI是微软视窗系统表征图形对象及将其传送给诸如显示器、打印机之类输出设备的标准。

GDI用来完成一些和绘制有关的工作，像直线或曲线的绘制，文本渲染，调色板控制。它不能用来直接绘制一些界面元素，像窗口、菜单等等，这些工作由用户子系统来完成，位于user32.dll中，它是创建在GDI之上的一个软件层。其他系统也有类似GDI的东西，比如Macintosh的Quartz（传统的QuickDraw），和GTK的GDK/Xlib。

The Graphics Device Interface (GDI) is a Microsoft Windows application programming interface and core operating system component responsible for representing graphical objects and transmitting them to output devices such as monitors and printers.

GDI is responsible for tasks such as drawing lines and curves, rendering fonts and handling palettes. It is not directly responsible for drawing windows, menus, etc.; that task is reserved for the user subsystem, which resides in use***.dll and is built atop GDI. Other systems have components that are similar to GDI, for example Mac OS X's Quartz and X Window System's Xlib/XCB.