本文提出一种“缺元匹配-反馈提醒”双向推理策略,解决了专业影视导演专家系统中多目标查询中无解的问题,并可通用于其它专家系统。“缺元匹配-反馈提醒”包括“缺元匹配”和“反馈提醒”两个子过程,“缺元匹配”是一个正向推理过程,它对规则的前提进行部分匹配并提出子目标,“反馈提醒”是一个反向推理过程,用于验证前一子过程提出的子目标并收集更多的事实信息。 This paper presents a bidirectional reasoning strategy of “lack of matching - feedback reminder” to solve the problem of no solution in multi-objective query of professional film director’s expert system and can be used universally in other expert systems. The “deficit match - feedback reminder” includes two subprocesses of “deficit match” and “feedback reminder”. “Disagree match” is a forward reasoning process, which partially matches the premise of the rule and proposes sub-goals. The feedback Reminder "is a reverse reasoning process that validates the subgoals proposed in the previous sub-process and collects more factual information.