TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The reaction solution comprises liquid water, malic acid, citric acid, sulfuric acid, sodium bicarbonate solution, calcium carbonate solution, cobalt chloride solution, iron chloride solution, cobalt sulfate solution, nickel chloride solution, sodium hydroxide, liquid ammonia or sodium borohydride. The solid reactant is distributed in pores of the porous structure. The solid reactant comprises sodium borohydride, magnesium hydride, calcium hydride, or aluminum. The catalyst solution comprises cobalt chloride solution, iron chloride solution, cobalt sulfate solution, or nickel chloride solution, and the solid catalyst comprises cobalt chloride, iron chloride, cobalt sulfate, or nickel chloride.    TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The hydrogen generation device further comprises: a pressurization device which is connected with the tank and adapted to pressurize the tank such that the reaction solution is delivered from the tank to the porous structure through the guide structure; and a spray device disposed at an end of the guide structure, where the spray device is adapted to spray the reaction solution on the porous structure. Preferred Method: The step of providing the porous structure, comprises: guiding the solution or catalyst solution to the porous structure; heating the porous structure such that the solution or catalyst solution precipitates the solid reactant or solid catalyst distributed in the porous structure. The step of guiding the solution to the porous structure, comprises: containing the solution in a first tank; providing a first guide structure connected with the first tank; guiding the solution to the porous structure through the first guide structure; containing the catalyst solution in a second tank; providing a second guide structure connected with the second tank; guiding the catalyst solution to the porous structure through the second guide structure; containing the reaction solution in a third tank; providing a third guide structure connected with the third tank; and guiding the reaction solution to the porous structure through the third guide structure.