在這現代化社會當中，許多人因毫無節制的飲食造成肥胖，不僅造成身心方面上的危害，也成為現代社會的文明病之一。本研究目的是探討飲食習慣對大學生身體質量指數(body mass index，BMI)之影響。本研究為橫斷式描述性研究，以大仁科技大學藥學系大二學生作為調查母群體，採問卷調查方式完成，共314名藥學生為研究樣本。問卷內容包含基本資料、飲食背景與習慣三大部份，收集所有已編碼的數據再使用Microsoft Excel和SPSS電腦軟體進一步分析。研究結果發現，受試者的BMI在正常範圍值內達六成三，將近四成學生體重並未在正常體重範圍之內，且不知道自己BMI的藥學生佔23.6%。不同性別與是否了解自身BMI的藥學生，其BMI變化有顯著性差異。就飲食習慣方面，僅有含糖飲料與蔬菜攝取次數，其BMI變化情形達顯著性差異。這些結果將有助於大學針對學生的不健康飲食習慣提供效果良好的多層面策略，進而達到健康促進與疾病預防的目的。

In this modernized society, many people who cause obesity because of unrestrained diet. It not only caused physical and mental harm, but also become one of the civilized diseases of modern society. The purpose of this study is to explore the effect of dietary habits on the body mass index (BMI) of college students. This cross-sectional descriptive study was conducted in the sophomore students in Department of Pharmacy, Tajen University. A total of 314 pharmacy students were participated in this study by using questionnaire. The questionnaire includes three main parts: basic demographic information, dietary background, and habits. Data were encoded and analyzed by using Microsoft Excel and SPSS computer software. The results revealed that nearly 63% of the subject's BMI were within the normal range, but nearly 40% of the student's weight was not within the normal weight range and 23.6% of pharmacy students not understood their own BMI values. Different gender and whether understood their own BMI of pharmacy students, their BMI change was significantly different. In the dietary habits analysis, only frequency of sugary drinks and vegetables intake, their BMI change had significantly different. These results suggested that it will help the university to provide the effective multi-level strategies for the unhealthy eating habits of the students, and thus achieve the purpose of health promotion and disease prevention.