A time information management system with a simple configuration that instantaneously causes the individual time information of a plurality of timekeeping means within a prescribed area to coincide with standard time information, is formed by time information signal generating means that generates time information that includes standard time information, a time information adjusting means that includes within it a first timekeeping means, receives a time information signal, and outputs time information of the timekeeping means, and second timekeeping means 5-1, 5-2, . . . , 5-n that are disposed in an area surrounding the time information adjusting means 3, the time information adjusting means 3 including a standard time information extraction means for extracting standard time information from the time information signal of the time information signal generating means 2, a standard time correcting means 7 that corrects the first timekeeping means 4 within the time information adjusting means 3 to the standard time information, and a time information output means 8 that causes output of the standard time from the first timekeeping means 4, the standard time being received by the second timekeeping means and the kept time stored in the second timekeeping means being corrected based on the standard time.