For the purpose of raising observation effectiveness and improving observation capability, the problem of observation task dispatch of vehicular optical observation equipment was addressed. The problem was modeled as one that aims to find the optimal observation plan. The mathematical description of observation plan was presented, the constraints which a plan must satisfy were summarized and the metrics which testify the plan quality were proposed. The multiple-attributes-decision-making method was employed to calculate the overall efficacy of plans and the optimal plan was obtained by sorting. Sample simulation showed the effectiveness of the proposed approach. The model and method fulfilled in this paper were novel and extendible, which is valuable for the application of vehicular optical observation equipment.