In order to design good product and improve the efficiency of design process, a correct product conceptual design process is discussed in the paper. The conceptual design of All-in-one (AIO) computer is studied. The sketch design and configuration, function analysis, the expression and formation of the scheme are also taken into account. This study is based on the requirements of market and user. A survey is designed to investigate user’s demand and the results are analyzed, according to the analysis results and aesthetics analysis, scheme design and model making are finished. The research on conceptual design process of AIO computer can provide a practical reference for designer.