OPAC作为用户从图书馆获取信息的最基本、最通用的途径，所提供的服务和功能是衡量一个图书馆服务水平的重要指标。近年来随着计算机技术、网络技术和情报检索技术的发展，它逐步突破了时间与空间的限制，Web2.0与OPAC的融合也让OPAC在使用及服务上也有新的突破。然而在Google、Baidu等网络搜索引擎的影响下，OPAC面临着巨大的挑战，与搜索引擎快速全文匹配检索的功能相比，由于检索机制和功能的限制，许多用户通过OPAC获取到相关信息的成功率并不高，进而造成许多珍贵而重要的资源常年无人问津，尤其是像音像资料、乐谱或地图资料等特殊类型的专业资料，用户很难通过专业的信息内容，如乐曲形式、比例尺等精准的定位和获取资源。然而目前国内很少有学者关注到用户在专业检索方面存在的问题。为了完善OPAC的专业检索功能，本研究以音乐专业为切入点，通过对OPAC系统及相关音乐检索系统的调研，发现当前OPAC在专业检索中存在的不足，然后基于MARC记录中提供的丰富数据，结合对音乐专业用户的检索需求调研，提出了OPAC专业检索改进方案的设想，最后提出当前图书馆OPAC应考虑添加专业检索入口、增加专业检索途径等建议，进一步扩大图书馆的服务面，让馆藏专业资料能够被快速发现和充分利用。

OPAC is the most basic and common way for users to get information from the library, whose services and functions can be an important indicator for measuring the level of library service. With the development of computer technology, network technology and information retrieval technology, OPAC has gradually breaks through the limitations of time and space, the rise of Web2.0 technologies and the integration with OPAC, the use and services of OPAC also make a new breakthrough. However, under the influence of Google, Baidu and other Internet search engines, the position of OPAC has been facing enormous challenges. Comparing with the capability of quickly retrieving and text matching from vast amounts of information of search engine, the success rate for many users to retrieve relevant information from OPAC is not high due to the limitations of retrieval mechanisms and functions. So many precious and important resource are always staying in libraries. It’s difficult for users to accurate position and access resources by some professional information ,such as music form, scale and so on, especially the audio-visual materials, notes and map data and other special types of professional information, what’s more, currently there is little scholarly attention for discipline retrieval.This study explores the OPAC systems and related music retrieval system, and finds that the problem of inadequate professional searchers exist in the current OPAC. Based on a wealth of data provided by MARC record, and combined with retrieval demands of professional users for music research, we presented an OPAC professional search improved scenarios, indicated that the current library OPAC should consider adding professional search portal, increase professional searchers ways to further expand the service, so that the data hidden in libraries can be more fully utilized. This study is an exploratory research, and has certain theoretical significance and practical value.