Abstract: The flow characteristics across different flow regions, engineering requires for aerodynamic force/heating predicting technique, and the research status in China and foreign countries are summarized. To solve the main problems of aerodynamic force/heating predicting techniques across different flow regions, some recent developments, such as the similarity criterion for experimental simulation based on viscous interaction and Knudsen number, framework optimization of microbalance as well as aerodynamic force measurement technique, the measurement of the middle and low heat transfer using infrared mapping, flow visualization and measurement, together with N-S/DSMC hybrid numerical method, have been presented, and further investigation is suggested.