网络电视，或称在线电视、在线电视、互联网电视，是利用互联网上进行电视直播。通常电视节目以WMV、ASF等串流媒体的格式，客户端须安装相应的播放软件，一般Windows Media Player或RealPlayer都支持网络直播。

不过网络上有许多混水摸鱼的软件，虽然声称是网络电视，但是却没有提供电视直播节目，只有网络视频点播（参见短片分享网站）。

Internet television (or online television) is the digital distribution of television content via the public Internet (which also carries other types of data), as opposed to dedicated terrestrial television, cable television, and satellite television systems which only carry video. It is also sometimes called web television, though this phrase is also used to describe the genre of TV shows broadcast only online.