Abstract: Timekeeping is one of the main missions at each time laboratory. The time scale UTC(NTSC), which is used the standard time in various fields reference directly or indirectly in China, is generated, kept and transmitted by the National Time Service Center (NTSC), the Chinese Academy of Sciences. However, equipments for UTC(NTSC) timekeeping are in operation, and do not have the conditions as the experiment platform at NTSC. They block timekeeping researches of UTC(NTSC). In order to solve this problem, an automatic monitor experiment system has been built by analyzing hardware and software of timekeeping system. This platform, which possesses the timekeeping function, can be used for researches on timekeeping aspects.

Key words: Timekeeping, Automatic monitoring, Time measurement