The invention discloses a method enabling parameters of computational problems in electricity test system to be changeable. The method comprises the following steps that a formula Y(yn)=F(xm) of the calculation model is set up corresponding to each problem, the stored data structures of types of the computational problems are defined, execution codes are automatically generated and dynamically compiled according to the formula of the calculation model, the execution codes enter an algorithm base to generate corresponding calculation model numbers, according to the calculation model and the set evaluation condition, self-variable parameter numerical values meeting the requirement are generated randomly and displayed on the problems, the problems with the different self-variable parameter numerical values are automatically generated for each test paper, when examinees submit the papers, and the calculation model number of each problem, the self-variable parameters generated automatically, and answers, filled in by the examinees, of strain parameters are uniformly transmitted back to a server. According to the method, the self-variable parameters are generated randomly to generate the problems, for the examination of the same knowledge point, different students can get the different problems, and therefore cheating is prevented, and the method is beneficial for examining the flexible mastery degree of the knowledge point by the students.