The invention provides a local time calibration method and a local time calibration device. The local time calibration device comprises the steps that: a server obtains timing time of two time pointsand a number of crystal oscillators of the server at the two time points; and whether to calibrate local time of the server by means of the timing time is determined according to the timing time of the two time points and the number of the crystal oscillators of the server at the two time points. The local time calibration method and the device do not rely on the local time of the server, determine whether to calibrate local time of the server by means of the timing time according to the timing time of the two time points and the number of the crystal oscillators of the server at the two timepoints instead of fixedly adopting a local clock or a timing clock, and can calibrate the time of local time by means of the external timing time (the counting of crystal oscillators is very difficultto change) when the local time of the server is changed manually and the timing time is valid, thereby achieving the bidirectional stability of the clock system of the server.