Considering all current certified seismic evaluation methods available in Taiwan are not applicable to unreinforced masonry structures(URM), a seismic analysis was performed based on ASCE7, and the dynamic procedure specified in the Taiwanese Building Code for this type of structures. Through case study on an existing URM building, a seismic evaluation procedure, alone with two retrofit proposals, are developed in this study, which can be use as reference for seismic evaluation of similar buildings.