The elevator is an indispensable means of transportation in high-rise building,and the design of elevator control system is of great significance for improving the reliability and safety of elevator operation.The modular elevator control system had been designed,including the modularization of the control cabinet,car roof control system,pit control system,and active safety detection system.Combining the Internet of Things with modular elevator control system can effectively predict elevator fault and achieve early maintenance.When installing new elevator,upgrading old elevator,or adding elevator to old building,adopting the modular elevator control system can shorten the construction cycle,reduce material cost,and improve installation quality.