The present invention relates to a system and method for managing investment money. According to the present invention, a plurality of modules are systematically connected and disposed in a communication pipeline of an IM (investment money) management backbone server. Thus, when a situation occurs in which IM rebalancing is required, the system and method of the present invention involve inducing a plurality of units which are owned by a customer to be tightly connected together like a mesh so as to form an IM rebalancing network. The system and method of the present invention enable a customer or IM management company to simplify and diversify an IP rebalancing network or IP portfolio in various patterns, thereby effectively increasing economic profits.