In order to upgrade the existing elevator control system, this paper presents a design of the main Controller in the elevator control system based on Micro Controller Unit of LPC2294. As for the Software design, the preemptive multitasking real-time operating system μC / OS is chosen as platform of the elevator system implementing the input/output, scheduling distribution, CAN communication; The hardware design with LPC2294 to achieve interoperability with the inverter, collection for pulse encoder feedback, input and output, etc.