Considering the pr oblem of cognitive radio intelligence optimization, a scheme of cognitive engine is proposed based on the glowworm swarm optimization with t distribution mu tat ion． The bionic principle of firefly algorithm is analyzed. The optimization mechanism is defined by mathematics and a mutation plan is also designed with t di stribution. Finally, the simulations are performed in the multi carrier system. The results show that the algorithm has higher converg e nce speed and larger objective function value than the basic GA algorithm. Furthermore, th e improved algorithm with t distribution mutation has the higher capability of the g loba l optimization than that of the basic GSO algorithm.