This paper describes the design of basic architecture in Value Growth Mobility System based on Timeaxis Design. Timeaxis Design is proposed as a design concept incorporating the viewpoint of time into the theory and methodology of design. This concept is expected to deal with issues such as the degradation of the environment and the aging of society. Additionally, Value Growth Design is concept of design, which embodies Timeaxis Design, allowing values of a product to grow through usage. Mobility System is designed to realize a Value Growth Design. In the past study, the concept that applies the Value Growth Design to a Mobility System has been proposed. In this study, we designed basic architecture using Multispace Design Method and SysML. We expressed functions of the system over time and the value that the user fells by the functions in the basic architecture. The basic architecture of the system is expressed by following the Value Growth process and by considering the time scale using the Multi-time scale model. As a result the basic architecture of the Value Growth Mobility System to realize the Timeaxis Design is proposed.