To provide a solution proposition support system capable of deriving a solution according to a user's demand and presenting the solution to the user.

This solution proposition support system is provided with a problem DB 100 for storing a plurality of hierarchically configured problem trees in advance, a correspondence DB 102 of problems and solutions for associating problems with solutions to manage them, and a calculation means 110 for calculating a solution to a problem, and makes the user select a problem from the plurality of hierarchically configured problem trees in the problem DB and give weight points to the selected problem. The calculation means calculates a solution from the weight points of the problem and the correspondence DB of the problems and the solutions according to a distribution rule 105 and presents a relevant problem tree as well as the solution to the user.