The invention aims at providing a 
hydrogen water preparation method and device, a 
bottled water production line and a water purifier or water dispenser which mainly solve the problems that 
hydrogen water prepared through an existing preparation method is poor in quality and drinking safety. The 
hydrogen water preparation method comprises the steps that a 
proton membrane and a 
cathode and an 
anode which are located on the two sides of the 
proton membrane are supplied; the 
cathode and the 
anode are electrified, and water is introduced into only one side of the 
cathode; part of the water is electrolyzed to generate hydrogen on the cathode side and generate 
oxygen on the 
anode side; the generated hydrogen is mixed with the water on the cathode side to form the hydrogen water. The hydrogen water prepared through the hydrogen water preparation method has the advantages of being fine in 
hydrogen bubble, high in hydrogen-enriched level and free of introduced contaminants; meanwhile, due to the fact that the generated hydrogen is uniformly distributed on the electrodes making contact with the water, the water-hydrogen 
mixing effect is good, and hydrogen enriching is better promoted; in addition, hydrogen generated through 
electrolysis has more activity and not only can be used for preparation in a large hydrogen water 
plant but also can be used for site production of small household water dispensers.