Laser weapons are sensitive to target and environment, of which tactical decision aids is complex and amount of calculation. The deep learning mechanism of weapon command, use and operation are established, which contribute to forming the intelligent assistant decision-making ability of laser weapon operational use. Both of them are the key to solve the problems about laser weapon of operation and use. They are also the means to promote the laser weapons of technicalization and real combat. The authors proposed preliminary conception of intelligent assist decision making based on multi-source data, case-based reasoning, nonlinear logic in the paper.