The invention discloses a set of technical scheme for thermal and solar double-energy seawater desalination. A heat source is connected in series with a heat supply loop. A plurality of seawater evaporation tanks on the same plane are connected in parallel with the heat supply loop, solar photo-thermal heating plates are arranged on upper layers in the seawater evaporation tanks to evaporate seawater, thermal heating pipes are arranged on middle layers in the seawater evaporation tanks to heat the seawater, steam condenser pipes are arranged on lower layers in the seawater evaporation tanks to condense steam. A temperature gradient of the upper, middle and lower layers in the seawater evaporation tanks from high to low is established, and a heat cycle of evaporating the seawater collaboratively by thermal energy and solar energy and recovering all steam condensation latent heat is formed. Problems about solar energy recovery, thermal conversion and steam condensation latent heat recovery are perfectly solved. All of a boiler, a nuclear reactor, a burner, industrial thermal exhaust gas and industrial thermal wastewater can be adopted as heat sources, so that the reduction space of the seawater desalination cost is very large. By utilizing the industrial thermal waste gas and the industrial thermal wastewater as heat sources, thermal pollution can also be eliminated, and synchronous increase of environmental protection benefits and economic benefits can be realized.