The full lifecycle evaluation of a project includes the process and content of pre evaluation, in-process monitoring, and post evaluation. Through investigation, research, and experience summary, the main problems in the current application of pre evaluation, in-process monitoring and evaluation, and post evaluation in China are identified. A project full lifecycle evaluation method system is established. Taking public rental housing projects as an example, primary evaluation methods such as logical framework method, project performance evaluation, and comprehensive indicator system evaluation are used to conduct full lifecycle evaluation of public rental housing projects,aiming to provide reference for the establishment of full lifecycle evaluation methods and indicator systems for government investment projects in various industries.