Regional unbalance in supply and demand of sand and gravel in Taiwan is required adjustment by various measurement. Over the long term, decreasing production of sand and gravel produced from rivers reduced year by year can cause a supply shortage; therefore the government needs to find an efficient strategy to solve the critical issue in advance. The key point to make it succeed is a reasonable distribution of all the sources from difference reserves in each area with a good exploitation plan and Strategic Environmental Assessment (SEA) on sand and gravel.