In order to improve the shortage of information technology application in vocational education assessment, a special sys

tem design for skill assessment of key posts of urban rail transit operation based on mobile APP is proposed. By analyzing the functional requirements, this paper designs the minimum configuration standard of the hardware operation platform of the post skill assessment system, decomposes the system functions, and designs six functional modules such as system management module and human-computer interaction interfaces such as home page flash page. Through the system test, it shows that the designed post skill assessment system meets the actual needs of subway driver order classes in terms of function, performance and adaptability. It has the characteristics of convenience and quickness.