QT通过三种形式提供了对线程的支持。它们分别是，一、平台无关的线程类，二、线程安全的事件投递，三、跨线程的信号-槽连接。这使得开发轻巧的多线程Qt程序更为容易，并能充分利用多处理器机器的优势。多线程编程也是一个有用的模式，它用于解决执行较长时间的操作而不至于用户界面失去响应-QT through three forms provides support for threads. They are respectively, a thread class, platform independent, thread safety event delivery, three, signal- slot connection across threads. This makes it easier to develop lightweight multithreaded Qt program, and can make full use of the advantage of the multiprocessor machine. Multithreaded programming is a useful model, which is used to solve a longer operation on without lose response user interface