The invention discloses a method for achieving
geothermal power generation through double-working-medium underground heat exchange and a heat exchange production structure. The method comprises the following steps that an
open hole section, a perforation section and a well section annulus are formed in a well from bottom to top; an electric
submersible pump and a first packer are put into a geothermal production well through a production
pipe column, and the
open hole section and the perforation section are sealed and separated through the first packer in a setting mode; the production
pipe column is separated from the electric
submersible pump, and a second packer on the production
pipe column sets and packs the perforation section and the well section annulus; a heat removal working medium injection pipe column is put down into the production pipe column, and high-pressure gas is injected into the annulus of the pipe column to replace accumulated liquid in the pipe column in a reverse circulation mode; the electric
submersible pump is started to circulate
geothermal fluid of a stratum, meanwhile, a liquid heat removal working medium, a gaseous heat removal working medium and the
geothermal fluid are injected into the heat removal working medium injection pipe column to complete double-working-medium heat exchange at the well bottom,
heat energy of the
geothermal fluid is converted into heat removal working
medium pressure energy, and the gaseous heat removal working medium is output from a well opening; and when the
wellhead stably generates the gaseous heat removal working medium, the
wellhead is switched to a
turbine to drive a generator set to generate power.