1. A consultative system containing an advice and having a projection device, for helping a user to improve one's interactive ability by analyzing a particular person's behaviors in a simulation environment, said particular person being selected from a group including said user, a person different from said user, and a virtual person, said system comprising: building a plurality of virtual events for said advice, said plurality of virtual events involving interactions among two or more persons; projecting said plurality of virtual events by said projection device; capturing a response from said particular person; analyzing said response according to said advice to produce a report; and providing said report to said user, whereby said system guides said user to observe and examine said particular person's behaviors in a simulation scenario so that said user can learn effectively from both one's own behaviors and other person's behaviors and is able to apply said advice more naturally in a real life.