A self- organized fuzzy control system used for a dual wavelength frequency stabilized CO2 laser with high precision is presented. Because of the very complex operating situation of the CO2 laser, especially the tough condition for simultaneous dual-wavelength stabilization, a series of parameters in the CO2 laser system must be controlled effectively. A self-organized fuzzy control system described in this peper is satisfied for these requirments. Both short and long term frequency stabilities of the simultaneous oscillations are better than several parts in 10 10.