The invention provides a timing system of on line advertisement for a television station and a method thereof. The system comprises a video upload workstation for collecting and processing initial advertisement video files, a clock image-text making workstation for making clock image-text information, an audio upload workstation for collecting initial audio files, an ethernet switch for transmitting the video files, the clock image-text information and the audio files, a program editing workstation for performing the EDL code edit to the received video files, the received clock image-text information and the received audio files, packaging and generating the template material, a central data base server for receiving and saving the video files, the clock image-text information and the audio files, and receiving and saving the template material, a combining and broadcasting device for combining and broadcasting the template material, and a timing device for synchronous timing of the system time and the standard time. By using the system and the method, the making and the broadcasting of the timing program are more flexible and convenient, and the material can be edited again for use, thereby saving plenty of time and resource.