The invention discloses a safety and risk analysis method and system for environmental protection measures in the power transmission project construction process. The method is completed in the mobile intelligence synergistic terminal, the implementation situation of the site power transmission project is acquired in real time, influencing factor datum related to the safety of the environmental protection measures in the power transmission project construction process are filtered, a safety and risk analysis is conducted on the environmental protection measures in the power transmission project construction process according to the filtered influencing factor datum related to the safety of the environmental protection measures, and finally a risk rank of the influencing factor datum related to the safety of the environmental protection measures in the power transmission project construction process is determined. The risk analysis process for safety of environmental protection measures in the power transmission project construction process has real-time capability, the analysis method is simple and the accuracy of analysis results can be ensured, the safety of the environmental protection measures in the power transmission project construction process is determined quantitatively and in real time, and the smooth operation of the power transmission project construction is ensured.