Sampling method and system based on chip protection device

The invention provides a sampling method and system based on a chip protection device. The method comprises the following steps: S1, receiving a first message issued by a host; S2, according to the receiving moment Ta of the first message and delay time t stored in a configuration file, and calculating the synchronous sampling moment Ts required by a host; S3, calculating a sampling value V corresponding to the synchronous sampling moment Ts; S4, constructing a second message based on the sampling value V; S5, sending the second message to the host. According to the method, the sampling authority is maximally issued to the sub-machine, wherein the sub-machine can calculate the sampling data of the sub-machine according to different requirements of the host, synchronize the sampling data and then send the sampling data to the host, so that the host is low in calculation amount and low in power consumption, the device runs more stably and is very suitable for chip protection of low-power-consumption equipment,