The purpose of this study is to investigate the effects of home informatization on the family system. This study is based on the systems approach. A family system is composed of two major subsystems-personal and managerial. Managerial subsystem is concerned to instrumental function, such as time management and financial management. Personal subsystem is concerned to expressive function, such as family relations and interactions. So this study attempts to analyze the effects of Internet on the family system through time management, financial management, and family relations. The results from reviewing several related researches are that home informatization through Internet use has changed time management, financial management, and family relations. Finally this study suggests three plans of home informatization for contributing to improve the quality of family living.