摘要： 2012年修订的《刑事诉讼法》和《民事诉讼法》正式确立了专家辅助人制度，扩展了具有专门知识的人参与诉讼的具体方式。在此背景下，本文从证据学视角，由学理和实务两个层面，阐明专家辅助人的由来，探究其价值功用，分析其立场定位，讨论其诉讼地位。专家辅助人之意见具有证据属性，而对专家辅助人意见的审查判断，应遵循三大特殊规则。同为当事人聘请的专业人士，专家辅助人与律师在庭审质证环节须有明确的角色定位和分工。

关键词: 专家辅助人, 专家辅助人意见, 鉴定意见, 质证

Abstract: Along with the amendments to the Criminal Procedure Law and the Civil Procedure Law publicized in2012，the expert assistant system is officially established in China，expanding the way in which the personswith expertise can get involved in litigation. In this context，the authors analyze some essential academic issues from evidence law and in both theoretical level and practical level，including the origin of“expert assistant”，the function and values of expert assistant system，the proper status and orientation of expert assistants. The authors also propose three target evidence rules exclusively to examine expert assistant opinions，and advocate that the functional positions and assignments expert assistant lawyers should be separated anddifferentiated under cross-examination.

Key words: Expert Assistant, Expert Assistant Opinion, Expert Opinion, Cross-Examination