Greenhouse energy management system can make some systemic administration such as measure and analysis for water flow, electric quantity and quality, heat energy, gas flow and some other energy parameters in greenhouse for achieving a certain energy-saving effect. The introduction of the technology is mostly based on PC platform. The embedded greenhouse energy management platform based on STM32 was designed. This paper gave the system hardware and software architecture including the selection of hardware, transplantation of μCOS-III, transplantation of embedded database, design of human-machine interface and the main process of software. Finally, the platform is verified by STM32-V5 development board of Arm fly. The results show that the platform can meet the basic needs of energy management in greenhouse, and it has the advantages of low cost, strong expansibility and so on, it is feasible and effective to apply it to the greenhouse industry in China.