Abstract: A kind of combination air-condition controller with microprocesser as the core is designed and the hardware arid software are also introduced. A kind of multi-mode strategy which includes proportion control, fuzzy control and fuzzy PID control is put forward to cope with the multi-variable nonlinear characteristics of the air medium. The side-wind system of a workshop building is taken as an object for the emulation experiment research. The experimental results proves the feasibility of the system design (Δt≤0.5℃, ΔHr≤ 3%,ΔP ≤ 3Pa).