Location-based social network (LBSN) services are being popular at recent times. These are being manifested as service tools for different purpose of our daily lives. One very important aspect of these LBSNs services is to promote the business and help users to find their desirable location to visit. In this project, our aim is to find out the Foursquare venue popularity in Taiwan and compare its result with the USA. This includes: what venues are popular in Taiwan and what kinds of venues are popular here. we will also show the temporal effect on venue popularity. Then we will present a comparative study of venue popularity between Taiwan and the USA. In the end, we will have some interesting observations based on this venue popularity. This investigation will do a great help to the business owners as well as to the general users to select the appropriate venues.