Using the ideas of scientific management for reference, this paper studies theaction-timeanalytical method of knowledge work, also forms a model ofaction-timeanalytical method for knowledge work as well as taking the example ofSend SMSto simulate the two simple mobile phone operation tasks. The model has been verified through contrastive experiment and the result shows that the operations interface which is designed underAction-timeanalytical method of the knowledge work becomes more efficient. The result o...