In order to response financial liberalization, globalization, Taiwan is tending towards all-round opening financial market and this make the Property-Liability Insurance market getting highly competitive. This study used panel data from 2011 to 2015 and combined Data Envelopment Analysis (DEA) and Malmquist Productivity Index (MPI) to evaluate the operational efficiency of Property-Liability Insurance Companies in Taiwan. The research results of Data Envelopment Analysis show that: (1)All property-liability insurance companies has not reached the efficient realm in overall efficiency and scale efficiency. That shows All property-liability insurance companies need to be intensively improved. (2)As to technical efficiency, Cathay, TLG, AIG Taiwan, are efficient companies. The results of Malmquist Productivity Index shows that all companies were not fully utilized in Total Factor Productivity Change.