Abstract: A timepiece with automatic time setting and speed adjusting system can, thru the dial telephone line, call the standard time repeat station to check the standard telephone system standard time. When receiving the time announcement signals from the time repeat station, a separation circuit and a voice signal identification circuit pick up the time calibration signal to calibrate the time and adjust the speed of the timepiece automatically. At the same time, a time differential signal is transmitted to the automatic dialing circuit to connect to the telephone line and store the time to a memory circuit to permit dialing the time repeat station again to process the automatic time setting system and automatic speed adjusting system. In addition, the timepiece is connected to several secondary timepieces which have a simple mechanism and circuit structure so as to assure that there will be no time variation with this invention.