Background/Objectives: This study investigates the effects of Smart Attributes of SPA on the perceived usefulness and Intension to Use of blockchain systems. To achieve the purpose of the study, we analyzed the effect of Smart Attributes of SPA on Perceived Usefulness and Intension to Use of blockchain systems using TAM.Methods/Statistical analysis: The data for this study were collected through a survey. We conducted a survey of users from June to August 2019. A Likert 5-point scale was used. The survey targeted Small and Medium Construction staff and using the Blockchain system. There were 719 valid cases. SPSS 24 and AMOS 22 were used for the analysis of collected data. The analysis methods were technical analysis, frequency analysis, correlation analysis, reliability analysis, factor analysis, CFA, Structural Equation Model.Findings: The findings can be implied in three ways: First, when designing a blockchain-based securities lending system, the system should be designed according to the user's purpose, that is, the 'Usability' attribute should be included in the function. Second, 'Customization' should be considered when designing the system. In other words, the needs of specific customers should be fully understood and reflected in the system design. Third, when designing a system, the 'Connectivity' attribute must be fully considered. It is to be able to connect social and device-to-device networks and all the connectable objects.Improvements/Applications: When designing a blockchain-based securities lending system, the four attributes of Smart Attributes of SPA should be fully reflected. In other words, if 'Usability', 'Customization', and 'Connectivity' are reflected as much as possible, it will contribute to the early settlement of the system.