With the accelerated construction of new-type power system, the importance of diverse, widely distributed, and massive demand side resources for the power system continues to increase. The typical characteristics of three types of resources under the broad demand side resource category are explored: post metering resources, distribution network resources, and weakly connected self-balancing resources; the difficulties encountered in its development process and the challenges faced in governance are systematically analyzed, mainly manifested in institutional embedding, market identification, and system collaboration; Furthermore, the research proposed countermeasures and suggestions to improve the relevant governance mechanisms on the demand side of electricity and unleashed the potential of demand side resources from the four dimensions of system, market, technology, and credit under the unified national electricity market system.