The invention provides a realization method and system for a data collection wireless MAC (Multiple Access Control) protocol with a time compensation function and relates to the technical field of a communication protocol. The method comprises the steps of collecting first data information and obtaining data time delay information according to the first data information; carrying out time marking on the data frames of the first data information according to the data time delay information, thereby obtaining frame end information; obtaining time information through a GPS system and carrying out calculation according to the time information and the frame end information, thereby obtaining data collection time information; packaging the data collection time information and first data information, thereby obtaining second data information, and sending the second data information to a data service center. According to the method and the system, the time accuracy of collecting data by a sensing node can be improved.