PURPOSE: To improve efficiency, by a method wherein a liquid receptor part, having in a shape formed in a manner to allow engagement of it internally of a heating part, and a gas and liquid exchange chamber, communicated with the liquid receptor part, are situated to a bubble acting part.

CONSTITUTION: A local high temperature part is produced in a part of the interior of a liquid receptor part 6 by means of heat 13 fed to a heating part 4, and bubble nucleus grows into bubble 20. Growth of the bubble 20 causes delivery of liquid 10. The liquid 10 is produced resulting from movement of the bubble 20 and the liquid 10 in a condition in that an interface between gas and liquid makes contact with the wall surface of the liquid receptor part 5. The new liquid 10 flows in the liquid receptor part 5 occasioned by arrival of the bubble 20 grown due to vaporization of a film layer of the liquid, to a gas and liquid exchange chamber 6. The bubble 20 is dissipated resulting from cooling of the heating part 4 due to the inflow of the liquid, and the dissipation causes suction of the liquid 10. This constitution enables production of the bubble 20 without increasing the temperature of the liquid 10, except the liquid 10 changed into the bubble 20, so much, and enables reliable and rapid dissipation of the bubble 20 grown by means of the gas and liquid exchange chamber 6 kept at a low temperature, and as a result, a ratio of charged heat energy to heat energy used for action of a pump is high, and the efficiency of a heat drive pump is improved.