In recent years, with the changing economical structure, lower birth rate, and increasing number of dual-income families, the purchasing power of children has been the focus of attention. However, current domestic surveys and studies of visual design of food mostly are focused on teenagers and adults, ignoring the emerging trend that children have higher purchasing power than before. In highly competitive consumer market, it is important for designers to make products stand out among others. But, could the elements of packing design recognized by designers also catch the eyes of "New generation"? Thus, we explore the question of how consumer can be attracted by a visual message on food packages by comparing the preferences between elementary school children and adults with a designing background to provide more effective packaging design for children. We divided this study into three stages according to research methods of "KJ method", "Questionnaire Survey", and "Topics Interview". The study is designed to understand whether the elements of packaging design by designers are also aligned with the preference of children in elementary school so that we can suggest some reference patterns of packaging design of soft drinks that targeting children. According to our survey, we have the following conclusions. 1. "Graphics" is the most important and widely used element in packaging design of soft drinks and snack food in the market. 2. Both elementary school children and adults with a designing background all regard "Images" as the leading eye-catching factor on food packages. Among the visual focus design elements, area ratio, color factor, and presentation arrangements are thought to be the more important ones. 3. Except the preferences on expressive form of "situation indicated by presenting color", there is no significant difference on food packaging between elementary school children and adults with a designing background. 4. Regardless of consumer's age, the most attractive packaging of products requires "large image-and-text area ratio", "borderless color print", and "clear presentation" to enhance the effect of visual persuasion.