Energy state monitoring is the basis of energy management. Data acquisition is an important part of energy monitoring. Sensors located in important parts of the unit are used to realize the operation of the unit, and the energy state is judged accordingly. This paper aims to study the modern acquisition method of monitoring information of various intelligent energy equipment based on CPLD, introduce the demand analysis, design ideas and frame design of intelligent energy saving system, and propose a new intelligent energy saving system. Layered platform software structure. A reliable and high-speed multi-type energy monitoring data acquisition system is designed using CPLD chip option. The functional design of energy-saving management and energy-saving technologies related to energy-saving are introduced. The smart energy system is mainly carried out by issuing management indicators and cooperating with relevant management policies. The reduction of energy consumption is the most important energy-saving measure at present. It mainly uses relevant algorithms to detect abnormal energy consumption and give early warnings to prevent energy waste.