An interpersonal network-based mutual assistance method, a service platform, and a system. Said method comprises: receiving investment information sent by a plurality of investors; acquiring an investment condition of each investor, and constructing an interpersonal network of the investor according to the investment condition, the investment condition being generated according to the investment information; receiving an assistance request, and reviewing the assistance request to obtain a reviewing resu and determining an assistance scheme according to the reviewing result and the interpersonal network, and assisting other people or institutions or related organizations according to the assistance scheme. The present invention can expand the interpersonal network of a person, and provide timely assistance for more people needing assistance on the basis of the interpersonal network and the service platform.
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