Abstract: With the increasingly difficult urban parking problem ,city traffic managers need a systematic evaluation system for a comprehensive analysis of the operation of parking facilities in support of parking management decision mak-ing .Based on the properties of the data uploaded from parking facilities ,a parking operation evaluation index is estab-lished by considering parking efficiency ,traffic impact ,operating income and other indicators .In this system ,the utiliza-tion ,turnover rate and parking time are used to reflect parking efficiency whereas the flow rates at the entrance and the exit are used to measure the effect .In addition ,the parking price and average income show the financial conditions while the flexible and monthly parking proportions reflect parking demand distribution .The paper describes how to calculate all the indices .Finally ,based on the actual parking data from an example ,all the calculation results and various indicators are illustrated and verified .