The implementation of our video investigation work involves condition of investment and effect .Bas-ic parameter, investment and effect of Zhou Ke-hua case, Boston Marathon Bombing case and London Subway Bombings Case are specific indexes of evaluating video investigation .Optimal effectiveness of video investigation is the maximization of investigation efficiency with limited cost .The economic model of optimal effectiveness of video investigation includes ideal and real functions .Optimal effectiveness of video investigation should also take content of law and sociology into consideration .Working approach of China's video investigation from the perspective of op-timal effectiveness is a integral project which involves theory , hardware , staff and mechanism .%我国视频侦查工作的实施状况包括投入与效果两个层面。周克华案、波士顿马拉松爆炸案、伦敦地铁爆炸案中的案件基本参数状况、资源投入状况与收益状况是评价视频侦查工作实施状况的具体指标。视频侦查工作效益最优是指在视频侦查资源成本投入一定的情况下实现侦查效益的最大化。视频侦查工作效益最优的经济学模型包括理想与现实状态两种函数。视频侦查工作的效益最优还应当兼顾法学与社会学领域的内容。效益最优视角下的我国视频侦查工作进路是一种体系化的工作形式，由原理、硬件、人员与机制四个层面的内容组成。
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