The invention relates to a power frequency regulation control method and system for a micro-energy grid system. The method comprises the following steps: when a current frequency offset of the micro-energy grid system exceeds a frequency offset limit value, judging whether the state of charge of an energy storage system in the micro-energy grid system is higher than 30% of stored energy of the energy storage system or not; if the state of charge of the energy storage system in the micro-energy grid system is higher than 30% of the stored energy of the energy storage system, using the energy storage system in the micro-energy grid system to carry out frequency regulation on the micro-energy grid system; and if the state of charge of the energy storage system in the micro-energy grid systemis not higher than 30% of the stored energy of the energy storage system, using gas turbines, a photovoltaic power generation system and air source heat pumps in the micro-energy grid system to carryout the frequency regulation on the micro-energy grid system. The method and system adopting the technical scheme has the advantages that the powers of the energy storage system, the photovoltaic power generation system and the air source heat pumps are regulated for the frequency regulation on the micro-energy grid system, so that the problem of an insufficient frequency regulation capacity in the traditional frequency regulation method is solved, the frequency regulation efficiency of the micro-energy grid system is improved, and higher practicality and stability can be further achieved.