In this study, we derived the characteristics of smartphone payment service system such as social commerce through domestic and foreign literature as variables, and based on the late accommodation model, we also influenced the effects of the variables on system reliability, non-parallelism, and sustainable use. Empirically verified.First, the exogenous variables that indicate the characteristics of the smartphone payment system are used to investigate how the characteristics of the system (convenience, security, economy, uneven distribution, interest) affect the reliability and non-parallelism of the parameter system. I want to try.Secondly, we analyze how the system's reliability and non-parallelism, which are characteristic parameters of the smartphone payment system, affect the level of sustainable use.Third, the characteristics of the smartphone payment system is an exogenous variable, the characteristics of the system and the parameters of the system reliability, non-parallelism will affect the degree of sustained use of the dependent variable in the factors that affect the Korean and Chinese users based on how Compare and analyze the differences that appear.Users using smartphone payment services can know that convenience, security, economy, universality, and interest are important. Here, it was found that convenience, security, economy, and ubiquity affect the reliability of the system, and safety comfort has a negative effect on complaining behavior. Therefore, a business providing a smartphone payment system service must develop a system that is convenient and reliable for users. Without efforts to ensure the security and financial loss of the user's personal information, the system may become more reliable. The system will be able to enhance its ongoing use with aggressive efforts to avoid frustration due to information security and financial risks that present users inconvenience and ease of use. There is a need to provide a customization system that is substantially useful to customers, taking into account the reliability and non-parallelism of the system. In particular, users who try to use smartphone payment services must strive not to be evaluated for dissatisfaction.You can see that there are differences in the system characteristics, non-parallelism and sustainability of smartphone payment service users in Korea and China. Korean users are judged by factors important to security and non-parallelism, and Chinese users are found to have more impact on speed and comfort. Therefore, it is desirable to grow the system in a direction that is fast, accurate, easy to use, and easy to use and reliable in order to increase user's convenience and reliability of the system in accordance with the changing times.