The invention discloses an energy performance contracting-based data acquisition gateway, which relates to equipment for automatically remotely acquiring and transmitting the energy consumption data of an energy utilization department. The energy performance contracting-based data acquisition gateway comprises a data acquisition circuit, a communication protocol conversion circuit, a transmission control protocol (TCP) / Internet protocol (IP) interface, 16 RS-485 communication interfaces and an RS-232 interface module, wherein the 16 RS-485 communication interfaces are 16 485 communication interfaces; the RS-232 interface module adopts a 232 interface chip U22; the data acquisition circuit is provided with 485 interface chips U1 to U16, analogue switches U17 to U20, a singlechip U21, the 232 interface chip U22, the 485 interface chip U23 and an Ethernet interface chip U24; and the RXD ends, TXD ends, RE ends and DE ends of the 485 interface chips U1 to U16 are connected with the singlechip U21 by the analogue switches U17 to U20 respectively. The energy performance contracting-based data acquisition gateway saves singlechip serial port resources, and reduces the cost.