Abstract: Energy storage is an essential resource for providing flexibility for power systems. It will be an indispensable part of the new-type power system in the future. In order to promote the large-scale application of energy storage and reduce the cost of using energy storage, cloud energy storage has received extensive attention from both academia and industry in recent years. However, traditional cloud energy storage mainly focuses on integrating and sharing electric energy storage resources. Since the current price of electric energy storage is still relatively expensive, the dividends released by the sharing of electric energy storage resources are still difficult to meet the expectation of users for "using energy storage with low price". To this end, this paper proposes a derivative mode of traditional cloud energy, i.e. storage-multi-energy cloud energy storage for power systems. The multi-energy cloud energy storage takes the district heating and natural gas systems as generalized energy storage and adds them to the cloud energy storage systems. It makes cloud energy storage a bridge connecting different types of energy systems. It can also further reduce the energy storage utilization cost for the users and achieve a win-win situation among multi- stakeholders. This paper introduces the basic operation mode, realization form and core advantages of multi-energy cloud energy storage. The research framework for multi-energy cloud energy storage systems is expounded, and the core issues and technologies that need to be focused on in the development of multi-energy cloud energy storage systems are prospected.