<；P>；PROBLEM TO BE SOLVED: To provide a method and a device capable of easily producing a high-concentration oxygen dissolved water at a low cost by solving the problem that obtained concentrations are each insufficient, and that low-priced products can be hardly realized even if the high-concentration oxygen dissolved water is conventionally produced in various methods. <；P>；SOLUTION: Bubbles are more fined by colliding two swirls 34 having oxygen-containing bubbles or more and oxygen in the bubbles are massively dissolved in the water flow. Both water flows are collided at a velocity equal to the sum of the velocities of both water flows and the impaction reaches several times to ten and several times a case that a single water flow impacts a stationary surface, thereby giving the maximum impaction to each water flow and the bubbles in the water flow are broken and fined. This allows the dissolution of the oxygen in the bubbles in the water flow to be promoted. <；P>；COPYRIGHT: (C)2008,JPO&INPIT
