1. A human-computer combination quality testing system for digital product testing, comprising: a digital testing part, a manual testing part, and a system improving part; wherein said digital testing part comprises: a component model testing, a fit model testing and an engineering drawing testing; said manual testing part is appraising of products from parts and assembly to end products by an inspector, for separating unqualified products from qualified products; said system improving part comprises: a rule descriptor, a rule parser, and a rule corrector; wherein said rule descriptor comprises: rule bindings, trigger conditions, degree types and reply types; said rule bindings comprise at least one of a component model testing binding, a fit model testing binding and an engineering drawing testing binding; said trigger conditions comprise standard conditions set according to standards of a point-line model, surfaces, boundaries and textures of a component model; restriction conditions set according to restrictions comprising an assembly relationship and an assembly sequence of a fit model; and correlation conditions set according to a size correlation and a view correlation between an engineering drawing and a model; said degree types are represented in a quantized percentage form according to requirements; said reply types comprise: an adjust-type, a modify-type and a redo-type, and said reply types are correlated with said degree types; said rule parser parses semantemes described in a rule, said parsed semantemes comprise relationships between symbols and basic elements comprising the point-line model, the surfaces and the textures; restrictions comprising proportions, associations, contents and sequences; and movements comprising hitting, squeezing and measuring; said rule corrector provides an interface for editing the rule, so as to expand, modify, delete and query the rule.