Network schedule is an indispensable vital technology with its advantage of improving work efficiency, shortening duration and reducing cost in the field of project construction. However, the development of the network schedule is a knowledge-intensive work and needs large quantity time and effort. Besides, problems also exist in the application of network schedule, For example, unreasonable project demarcation, inexplicit logical relationships between activities and disordered project coding. In order to make better use of the advantages of the network schedule and contemporarily avoid the disadvantages in construction schedule generation process, more and more researchers dedicated to the automatic generation of network schedule. This paper described the development of the automatic generation of network schedule both inland and abroad, analyzed its necessity and provided the detailed analysis about the schedule generation methods on three aspects such as application area,operational processes and its development. In the end, the advantages and disadvantages of the various methods are refined, the prospect of automatic construction schedule generation was demonstrated.