This dissertation explores the development of an effective and complete quality management system by insurance companies. Using structural equation model to develop the core variables of underwriting and ratemaking. To verify these assumptions, this study examines auto physical damage insurance and group injury insurance, which are two different policies with varying features. In the case of auto physical damage insurance, the risk factors are claims, human, auto, road environment, and place factors. The results indicate that the variables in underwriting factors such as single, region imply the existence of adverse selection. There is no significant evidence to imply the presence of ex-ante moral hazard. For group injury insurance, the risk factors are underwriting, rates, and business factors. The number of groups in the rates of factors support for insured amounts for daily hospitalization indemnity indicate the presence of ex-ante moral hazard.