Since effluents from wastewater and desalination plants are typically more saline than the surrounding seawater, the technical and economic feasibility of such applications can be high. Further research is needed to map the potential for hybrid solutions beyond just terrestrial saline lakes and other types of saline reserves. The relatively small experience base for salt gradient technology also has implications for policy makers, as technology developers seek support and stability to continue to demonstrate this technology. Unfortunately, due to the lack of credible funding mechanisms, Statkraft, one of Europe's largest producers of renewable energy and a major Norwegian energy company, has seen a breakthrough this year (2014). We plan to end our energy initiatives. Investor surveys and results obtained for the period 2006-2014. The salt gradient force is the energy resulting from the difference in salt concentration between two liquids. It has two main applications. As a “standalone power plant” where rivers flow into the sea, or as hybrid energy production processes focused on energy recovery from production processes such as desalination and sewage treatment plants. Salinity gradient power generation is an alternative to renewable energy because it draws energy from renewable, naturally occurring processes. Diaphragms are an important part of most salt gradient power generation technologies. Commercial plants require very large quantities of membranes. For example, a 2 MW power plant requires at least 2 million m2 of membrane area, which must be replaced and maintained over time (5 years). More efficient membranes are already available on a small scale, but scaling up the plant will require much larger quantities. The total current output is obtained from the sum of all membrane potential differences. The main reason for this high cost is that the salinity gradient performance of currently available membranes is two to three times higher than commercially available membranes. Further refinement of theoretical or technical feasibility is required to assess the actual potential of salinity gradient power generation. This requires an analysis of what constitutes ecologically and legally justified withdrawals. Desalination plant brines have not yet been extensively mapped and are therefore not included in global estimates of salt gradient performance, but are likely to be commercially available in a relatively short time. For example, a number of feasibility studies have been conducted in Canada, confirming the existence of the potential for salinity gradients near urban and industrial centres. Although significant progress has been made in technical development of salinity gradient technology and field demonstrations using natural and anthropogenic salinity gradients (such as seawater-river water and desalination-brine-wastewater, respectively), fouling remains It is a significant operational challenge that can seriously hinder cost competitiveness. Natural high-salinity sources (such as high-salinity lakes and salt domes) offer the opportunity to overcome some of the limitations inherent in saltwater river water, as they can achieve larger concentration differences. The technological advances required to fully exploit larger salt gradients have been identified. Seawater desalination brine is a seemingly attractive high-salinity anthropogenic stream that would otherwise be wasted, but its actual feasibility depends on the right combination with a suitable low-salinity water stream. The technology solution is pollution-free and heat regenerative for use in low-temperature heat applications. A rigorous techno-economic evaluation provides a clearer picture of the prospects for low-grade heat conversion and large-scale energy storage. Seawater desalination is an important way to solve the freshwater shortage problem. Low energy efficiency and high cost are drawbacks that exist in seawater desalination. The paper describes the working principle of the system and analyses the detailed working process to estimate the energy output and energy consumption of the system. With proper design, it has been proven that the energy output of salt gradient power generation system can meet the demand of seawater desalination system.