Abstract: In order to realize the design purpose of automatic beverage making machine——exhibitting the automatic control technology and multi-type driving methods, a deep discussion about the hardware and software of control system is made. After analyzing the control method of the system and concluding that it is connection / disconnection control, a control system that adopts the programmable logic controller (PLC) as the core is proposed. Then the hardware structure of control system is decided and the flow chart of software is given. A modular design method for programming PLC software is adopted. Adding clients PC and server PC into control system is convenient for operation and management. At last, by using the network communication technology and serial communication technology, an available design of 3-ordered monitoring and controlling system is proposed, which consists of a server, a client and two sub-level controllers. The field-running condition proves good.