Overweight and obesity are well-known as an important global health issues, and nearly half of the adults in Taiwan are overweight or obese (47.9%). This study aimed to systematically reviews all systematic reviews that compared low-carbohydrate and low-fat diets for the effect of weight control among overweight or obese adults. Literatures were searched using both Chinese and English keywords from major databases. The ROBIS - a critical appraisal tool for systematic review was used. A total of 576 articles were searched, non-systematic review, duplicate articles, atypical SR and irrelevant articles were omitted. Three systematic reviews of randomised controlled trials were included in the current study. We found that both low-carbohydrate and low-fat diets were effective in reducing body weight among overweight or obesity adults. A low-carbohydrate diet resulted in an additional 1 to 2 kg of weight loss from a lower-fat diet. These two diets lasted for 16 weeks could produce initial weight-control results.