Comparing to the dispersed sea-use way, the intensive and economical sea-use method is a way to change the traditional method, which can implement intensive development in suitable marine areas with suitable scales in flakes. Intensive sea reclamation engineering with comparatively large scales will inevitably impact on the sustainability of economy, environment and resource. Since 2009, Shandong government has planned 9 large and 10 small sea areas, total about 1500 square kilometers for the intensive and economical sea-use. In order to evaluate the sustainable development level of the plan, the paper established a framework model of economy, resource and environment, as well as a sustainable development index system of intensive and economical sea-use in Shandong. An entropy method is used to determine the corresponding evaluation standard and evaluate the sustainable development level of intensive and economical sea-use in Shandong comprehensively. The result shows that the sustainable development level of intensive and economical sea-use in Shandong is acceptable.