The success of Robo Advisor is not only by intention but by the use of the technology and actual implementation by users. The rapid growth of internet penetration, online adoption of technology, and government support in Indonesia contribute to significant investor growth since 2018 with the presence of technology that makes it easier to open accounts and online transactions. Is the presence of Robo advisor technology also expected to be used and be a tool in investment decisions? This paper provides a conceptual model to extend potential variables in the usage of Robo advisor and behavior investor perspective to use Robo advisor as the decision tools to invest. We use Perceived Usefulness as the basic theory of the technology acceptance model and add Investment literacy, Trust, and Perceived Risk as variables related to investment decision variables. So that the proposed model can be used as a basis for empirical research in the future to validate the context of accepting and actual use of Robo advisors by investors in Indonesia