In China, flooding is one of the most common and frequent natural disasters, which can causes enormous life and property losses due to heavily damage and collapse of rural buildings. Hence, it is very important to conduct comprehensive study on flood damage to rural buildings. In this paper, the background and composition of the computer software AEFARUB, developed by authors, for analyzing and evaluating flood actions on rural buildings are introduced firstly, and then all sub-modules are described with emphasis on the distinguishing features and principles. The contents presented in this paper may be useful references for further study and application in engineering practices.