Embodiments of the invention provide an interactive problem solving method, a server and a system, so that the problem that the convenience needs to be improved due to the fact that a user needs to answer questions by handwriting in the prior art is improved. The interactive problem solving method comprises: obtaining a to-be-solved geometric problem selected by a user; sending each known condition of the to-be-solved geometric problem, all solving rules related with the known conditions, and all conclusions capable of being directly obtained by performing one-step reasoning on each known condition to a user terminal; obtaining the known conditions, the solving rules and the conclusions selected by the user and sent by the user terminal; judging whether the conclusions selected by the user can be directly obtained or not according to the known conditions and the solving rules selected by the user, and if so, adding the selected conclusions as newly added known conditions into the known conditions of the to-be-solved geometric problem. With the interactive problem solving method, the user can perform intelligent click-type question answer on a platform, so that the method is convenient to use and good in interactive experience, meets actual demands, and is easy to popularize and apply.