A kind of extended stochastic colored Petri net (ESCPN) is put forward which combines the hierarchy and object-oriented idea concerning the defects of Petri net that it is inadequate to describe electronic countermeasure intelligence system. The structure of Petri net, modeling elements and run rules are extended in the ESCPN model. Its performance indexes based on the state equation of Markov chain (MC) are analyzed. Then the ESCPN model of electronic target intelligence producing is given and the time performance is analyzed. It is shown that ESCPN is same as a continuous time Markov chain, and the description and analysis abilities of Petri net model are enhanced.