The invention mainly relates to a staggered-truss steel structure system with uniform stiffness. In the staggered-truss steel structure system, stand columns are distributed on the two longitudinal sides of a structure every other layer in a staggered mode. According to the technical scheme adopted by the staggered-truss steel structure system, the longitudinal stiffness of the structure is improved, and relative equilibrium of the stiffness in two directions is achieved, so that the problem of overall structure turning is solved, and the staggered-truss steel structure system is widely popularized.