The instrument for evaluating clinical applicability of guidelines (version 2.0) is designed to evaluate the clinical applicability of guidelines quantitatively. It is helpful to select guidelines with high clinical applicability and provide suggestions for revision. The evaluators are consistent with the target users of guidelines. The instrument consists of basic information, evaluation items and scoring scheme. The evaluation items are related to accessibility, readability, acceptability, feasibility and overall evaluation. Therefore, this article provides a detailed interpretation of the instrument and references for future users.