This invention provides a self-adaptive time tick method and system of a being-timed device 1588. The method comprises the following steps: accessing 1588 messages to the being-timed device through a plurality of time service networks; performing parallel synchronization to the input 1588 messages to perform identification and time mark in a plurality of time service networks; according to a 1588 protocol, acquiring precise time tick time of each time service network; inputting the precise time tick time of each time service network to a local clock of the being-timed device; acquiring the running state information of the being-timed device; and according to the precise time tick time of each time service network and the running state information, dynamically adjusting a preset following strategy so as to perform self-adaptive adjustment to the time service network selected by the time service device. In the whole process, 1588 messages are transmitted at the same time by redundant multi-networks; and the time service device is adjusted in a self-adaptive way to select the time service network so that the time service reliability is improved effectively.