本研究主要目的在發展一個「全校性健康五蔬果」介入計畫，並進一步探討其介入效果。本研究採「前測－後測不等組」實驗設計，以彰化縣立鹿鳴國中一年級各三個班級為實驗組一及實驗組二，以彰化彰立和群國中一年級三個班級為對照組。「全校性健康五蔬果」介入計畫，分析班級性教學活動及全校性教學活動，實驗組一先接受班級性教學活動，再接受全校性教學活動介入，實組二只接受全校性教學活動介入。研究工具為前後測自填式結構性問卷，問卷回收率達98.11%。最後有效問卷為306份，佔95.92%。研究結果發現「全校性健康五蔬果」介入計畫實施後，實驗組一的每日五蔬果五個變項對照組都達統計上顯著差異；實驗組二除了每日五蔬果「認知」「自覺障礙」與對照組未達顯二差異其餘變項都和對照組達統計上顯著差異。實驗組一日五蔬果的五個變項前後測都達統計上顯著差異，實驗組二前後測除了「自覺障礙」外，其他四個變項也都達統計顯著差異。若是在控制前測得分下，實驗組一的每日五蔬果「認知」與「自覺障礙」和實驗組二有達顯著差異，「自覺利益」、「社會支持」和「行為」等變項未達顯著差異。根據本研究結果，建議未來在發展每日五蔬果教育計畫課程時，應透過全面性整合的教育方才可增強學生改變的興趣與意願，且對學生每日五蔬果行為亦才能產生顯著提昇的效果。

The purpose of this study is to develop an effective school 5-A-Day education program related to the dietary behavior of junior high school students. Quasi-experimental method is used to explore the effect of the treatments on junior high school students. Treatment activities in the education program are designed to have designed to have two sections as classroom activities and school-wide activities. Subjects were divided into three groups, two as experimental groups, and the other as control group. The first experimental group is treated with both classroom activities and school-wide activities; classroom activities wee held first, and then followed with school-wide activities. The second experimental group is treated with school-wide activities only. The control group is treated without any activities. All the subjects were sampled from two junior high schools located in Chanhwang County. Questionnaire is used as the measurement instrument. Totally 306 out of 319 subjects are valid for statistical analysis. Results reveal the following information: 1.The mean scores of the knowledge, Prons, Cons, social support, and behavior about 5-A-Day in the post-test of the first experimental group are significantly different from those of the control group. 2.The mean scores of the Prons, social support, and behavior about 5-A-Day in post-test of the second experimental group are significantly different from those of the control group. However, their mean scores of the knowledge and Con about 5-A-Day are not significant. 3.The mean scores of the knowledge and Cons about 5-A-Day in post-test of the two experimental groups are different significantly. But the mean scores of the Prons, social support, and behavior about 5-A-Day of the to experimental groups are not significant. According to the findings in the study, it is recommended that the health educator should design a 5-A-Day education program according to the strategies of behavior change, social cognitive theory, health communication theory, social support and other important items. Meanwhile, the education program should contain health concept promotion, school environmental changes and media marketing campaign.