Abstract: As information technology has been widely implemented onto the transit system,an extraordinary a-mount of Integrated Circuit (IC)card data and GPS data has been recorded,which can be used to quantitatively analyze the loading index of regional transit system.Based on the IC card and GPS data,this paper selects the following evaluation parameters:load factor,berthing time,boarding/deboarding volume and surplus capacity to develop a transit loading in-dex model,then develops a system for classifying zonal transit system based on their loading.According to the importance and boarding/deboarding volume of stations,this paper also develops the threshold of weighting coefficients for them. Taking Guomao and Dongdan area in Beijing as case studies,this paper calculates the loading indices of these areas,and analyses the reason for the differences between the loading of the two areas based on spatial and temporal factors.The ob-served IC card data is used to extract the boarding/deboarding information,which is used to testify the proposed model.It is found that the model can effectively reflect the loading of regional transit system.