本研究旨在探討高中職學生身體意象與減重意圖之現況及其相關因素，研究採橫斷式調查法，研究對象為桃園縣兩所高中及一所高職之全體在校學生，以分層集束抽樣法進行抽樣，共發出問卷1,080份，有效問卷1,007份，有效回收率為93.2%。以結構式問卷收集資料，所得資料以獨立樣本t-檢定、皮爾森積差相關、單因子變異數分析、逐步迴歸等統計方法進行分析。重要結果如下：

一、研究對象之外表評價：男生高於女生，實際體型分類為過輕與適中者高於肥胖者，自覺體重為過輕與適中者高於過重與肥胖者，過重者高於肥胖者。
二、研究對象之外表取向：女生高於男生，參與過舞蹈社團者高於沒有參與過運動社團者及參與球類社團者。
三、研究對象之身體各部位滿意度：男生高於女生，就讀男女合班之女生高於純女生班，實際體型分類為過輕者，高於過重者與肥胖者，適中者高於肥胖者。自覺體重分類為過輕者、適中者均高於過重者與肥胖者，過重者高於肥胖者。父母教育程度為大學以上者，高於小學或國中者。
四、電視媒體的接觸與外表取向呈正相關，顯示研究對象受到電視媒體的接觸影響愈深者，對外表愈重視。
五、社會支持與外表評價、身體各部位滿意度呈負相關，與外表取向呈正相關，顯示研究對象受到社會支持影響愈深者，會愈重視外表，但對外表評價愈差、身體各部位滿意度也愈差。
六、研究對象之減重意圖：未來六週內會考慮減重的研究對象佔了42.1%。女生減重意圖高於男生，就讀純男生班高於男女合班之男生，實際體型分類為適中、過重、肥胖者，高於過輕者，過重與肥胖者均高於適中者。自覺體重分類為適中、過重、肥胖者高於過輕者，過重與肥胖者均高於適中者。
七、電視媒體的接觸、社會支持與減重意圖呈正相關，顯示研究對象受到電視媒體的接觸、社會支持影響愈深者，減重意圖愈高。
八、外表取向與減重意圖呈正相關，顯示研究對象對自己外表愈在意者，減重意圖愈高。外表評價、身體各部位滿意度與減重意圖呈負相關，表示研究對象對自己外表評價愈差、身體各部位滿意度愈差的人，減重意圖愈高。
九、自覺體重、電視媒體的接觸、有無參與運動社團的經驗、社會支持、減重意圖、父母教育程度為身體意象的重要預測變項，共可解釋14.6%的變異量。自覺體重、電視媒體的接觸、性別、實際體型分類、身體意象、班級類別（男女分合班）、社會支持為減重意圖之重要預測變項，共可解釋43.0%之變異量。

The purpose of this research is to understand body image and weight reduction intention and the related factors of students in the senior high and vocational schools. The research utilized the cross-sectional design, based on two senior high and one vocational school students of Taoyuan County as the research samples. The study randomly selecting sampling issued 1,080 copies of questionnaire of which 1,007 copies were effectively retrieved. The effective retrieving ratio is 93.2%. Data analyses included t-test, Pearson product-moment correlation, one-way ANOVA, and stepwise regression analysis. The main results are shown as followed:

1. Appearance evaluation: male subjects felt higher satisfaction with appearance evaluation than females; the subjects of real underweight and normal weight were more satisfied than the obese; the subjects of self-perceived underweight and of normal type were higher than those of overweight and obesity; overweight subjects were more satisfied than obese ones.
2. Appearance orientation: female subjects were more concerned about appearance orientation than males; the subjects who joined in dance clubs were more concerned than those who participated in ball clubs and never signed in sport clubs.
3. Body area satisfaction: male subjects felt higher satisfied with body area satisfaction than females, the females in the co-educational class were higher than single gender class, real underweight was higher than overweight and obesity, normal was higher than obesity, self-perceived underweight and normal were higher than overweight and obesity, parent’s education above university was higher than elementary and junior schools.
4. There was a positive correlation between television media coverage and appearance orientation. Therefore, the greater the influence of media was the greater the appearance orientation became.
5. There was a negative correlation among social support, appearance evaluation and body area satisfaction. That indicated that the greater the social support was the lower the appearance evaluation and body area satisfaction were. There was a positive correlation between social support and the appearance orientation. Therefore, the greater the influence of social support was the greater the appearance orientation was.
6. Weight reduction intention: 42.1% of students had the weight reduction intention in the coming six weeks. Females had significantly higher weight reduction intention than the males; males in single gender class was higher than co-educational class; subjects weight of normal, overweight, obesity types more enthusiastic than those who were underweight; overweight and obese subjects were higher than normal subjects; subjects of self-perceived weight, normal, overweight, obesity, were more enthusiastic than underweight subjects, overweight and obesity subjects were higher than those normal.
7. There was a positive correlation among television media coverage, social support and weight reduction intention. Therefore, the greater influence of media and social support became the greater the weight reduction intention was.
8. There was a positive correlation between appearance orientation and weight reduction intention. Therefore, the greater the appearance orientation was, the greater the weight reduction intention was. There was a negative correlation among   appearance evaluation, body area satisfaction and weight reduction intention. It revealed that the lower the appearance evaluation and body area satisfaction, the greater the weight reduction intention was.
9. Six variables including self-perceived weight, television media coverage, sport club, social support, weight reduction intention, and parent’s education can generate the total explained variance of 14.6% for body image. Seven variables including self-perceived weight, television media coverage, gender, real weight, body image, single or co-educational class, social support can generate the total explained variance of 43.0% for weight reduction intention.