Theories of artistic development should take account of the specific interaction between artistic expression and cognitive development. This study is designed to investigate the development of expressivity in children's and adolescents' drawings by modifying Ives'(1984)and Winston, Kenyon, Stewardson, and Lepine's (1995)research methods and categorization of representational strategies of literal expression, abstract expression, and content expression. In the study, eight age groups(ages four, five, six, seven, nine, eleven, fourteen, and sixteen)were randomly selected to participate in the experiment. The result suggests that age is a factor in the development of expressivities and the use of there presentational strategies changes as children grow.