On the basis of theory of Ricardian Rents and ecological footprint, connotation of ecological land rent is analyzed in this article, and empirical study with China data is made with related estimation method to calculate the amount of ecological land rent. In a certain period, the ecological bio-capacity of land resource is limited because land resource is of scarcity and the technical progress is also finite. In order to obtain products and services from land resource over its bio-capacity, more inputs are necessary, which is equivalent to increasing the cost to eliminate ecological deficit, and correspondingly result in price increasing of a marginal product. Therefore the output on the basis of land bio-capacity can avoid the cost of eliminating ecological deficit and get super benefit, that is, ecological land rent similar to Ricardian rents. Then, corresponding relation between ecological footprint and every industry is made, and the model of input and output is applied to measure the amount of ecological land rent, the result shows that amount of ecological land rent per unit economy output in China of Year 2007 is 0.082, and the total number of economical land rent is 7258711 million RMB yuan, which is 27.3% of added value of the whole year's total output. In different industries, agriculture, forestry, animal husbandry and fishery have achieved the greatest amount of ecological land rent per unit economy output, and the corresponding number of production and supply of electric power, heat power and water are close behind. What is worth to mention is that mining, quarrying and manufacturing industries have access to get the largest total number of ecological land rent, which is much more than agriculture, forestry, animal husbandry and fishery and any other industry. The research shows that there are two accessible ways to eliminate the ecological deficit. The first way is to keep the final consumption demand level within the bio-capacity of land resource. In this case, China has to cut off 60.7% of the current final consumption demand. The other way is to take ecological taxation which is equal to the ecological land rent in quantity. The ecological tax should be used to protect and governance the ecological environment, and then to maintain the stability of the land biological productivity. So, if fully accounting the impact of ecological land rent to human and environment, the social product price would increased correspondingly, which means the cost of human life increased considerably, but it's the necessary cost must be paid for maintaining the ecological balance.