本文的目的在探討資訊檢索中最常使用的檢索策略和檢索技巧，其中包含分區組合檢索、引用文獻滾雪球法、簡易檢索、主題層面連續檢索、主題層面配對檢索和多重資料庫檢素等各種檢索策略及Harter、Bates和Fidel所提出立各種檢索技巧。希望經由深入了解檢索策略和韓素技巧，提高檢索者線上檢索之品質。

　　This article describes search strategies and heuristics commonly used in online searching. The search straregies discussed include the building block strategies、citation pearl growing、briefsearch、successive facets strategies、pairwise facets strategies and multiple databases strategies. The heuristics -addressed are provided by Harter、Bares and Fidel. Through carefully using those strategies and heuristics, the results of online searches will be much better.