In recent years, with the spread of tablet computers, such as the iPad, and the accompanying increase in the number of users, applications such as electronic musical scores have been developed that exploit the special features of tablet computers. In comparison with scores written on paper, current electronic musical score applications make scores easy to carry and allow easy saving and management of the score data. However, existing electronic musical score applications were developed considering individual use (principally by pianists), and when using electronic musical score systems for a wind orchestra, for example, the load placed on the musical performers is effectively the same as when using paper scores. In this research, we focused on the activity of page turning as one aspect of the load on musical performers. There is a possibility of reduce the load of musical performers, when the page turning decreases. So we proposed a electronic musical score system that can reduce the page turning load.