The invention relates to a multi-parameter modular oil and gas pipeline safety monitoring system and method. The system comprises a data analysis early warning device and at least one data collectionand storage device. The data analysis early warning device is in communication connection with the data collection and storage devices. Each data collection and storage device is arranged at the preset position of an oil and gas pipeline and used for collecting and storing safety data formed through multiple parameters at the preset positions of the oil and gas pipeline at the preset collection frequency, and transmitting the safety data to the data analysis early warning device. The data analysis early warning device is used for analyzing the safety data to obtain analysis results, and generating corresponding early warning information and adjusting the preset collection frequency according to the analysis results. Multiple parameters of multiple oil and gas pipelines can be collected, and potential safety hazards can be conveniently found in time. By adjusting the preset collection frequency, battery energy can be saved, working time can be prolonged, and the workload of maintenancestaff is reduced.