The invention provides a terminal time adjustment method and a device, and the method comprises the steps: a short message of time synchronization request is sent to a first terminal; when the first terminal detects that the short message comprises preset synchronization key words, the synchronization short message returned by the first terminal is received, the synchronization short message comprises message return time value of the first terminal; the synchronization short message is analyzed, and the time of a local terminal is adjusted according to the analyzed time value. The method and device can automatically complete the time adjustment with the help of other terminals without influencing the message sending function in prior art, and have advantages of simple operation and high accuracy.