This article aims to report a health promotion program in a workplace to reduce the overall weight of the employees. In 2016, a total of 1,571 employees completed their health checks, and high body mass index (BMI) was observed in 43.6% of them. This health threatening issue motivated this project. After investigation, the causes of high BMI were associated with diet, activity habits and behavioral problems. Therefore, the task force carried out seven improvement programs addressing the above issues: (1) organizing a light food cooking course;(2) organizing sports training courses; (3) adding a calorie calculation function to the employees’ Health Management System; (4) holding an activity named‘Fighting BMI’; (5) launching light meals at the hospital restaurant; (6) integrating and promoting participation in an activity society within the hospital; and (7) designing a healthy bingo card. As a result, a total of 102 employees participated in this project and the overall body weight dropped by 5.48%, with an average weight loss of 3.8 kg, reaching the goal of the project. The findings show that good eating habits and regular exercise are important steps to healthy weight loss.