A washing machine and a washing control method of the same that is capable of controlling laundry to be effectively washed with bubbles depending upon load of the washing machine. The washing control method includes supplying wash water and detergent into a water tub, heating concentrated detergent liquid including the wash water and the detergent mixed with each other, generating and supplying bubbles into the water tub when the temperature of the heated concentrated detergent liquid reaches a predetermined bubble generation temperature, and washing laundry with the supplied bubbles.