The power supply and distribution capability of remote power supply system, directly affects the development and construction of the marine integrated information optical network. The structure of remote power supply network and high power shore-based power feeding and high power supply changeover submarine unit, are the keys that need to be solved. According to the marine integrated information optical network with different application characteristics, the corresponding remote power supply system scheme and power budget method are proposed by theoretical analysis of the network structure and application environment, and the realization scheme of shore-based power feeding equipment (shore station high power output) and sub-marine unit (high power conversion of underwater power supply) is given. Finally, the development direction of remote power supply technology for marine integrated information optical network is pointed out.