Eating patterns tend gradually refined. Often, the more delicate foods, usually accompanied with high-calorie, high-fat , high cholesterol or other ingredients.Since eating behavior is inappropriate and the pressure of military servicemen's work is heavy then they unconsciously excessive intake calories, obese people have an increasing trend in recent years. So military servicemen's busy work, long working hours is more important to the cognitive of obesity, eating habits and nutritional knowledge. Therefore, this study will take military servicemen's as research target, to further explore their cognitive of nutrition knowledge, their dietary behavior, and the relationship between the two.