Unmanned sale is widely adopted in Japan as a way of direct sales of agricultural products. It has, however, problems that change is not handled, receipts are not issued, deferred payment is not acceptable, and all sales management must be done by farmers themselves. The UAPS (Unmanned Agricultural Product Sales) system aims to solve these problems. We completed development of an implementation for evaluation of the UAPS shop system that is an embedded system forming a core component of the total UAPS system. This paper considers its design, major technical solutions and results.