To elucidate the microscopic turbulent structure around the rising bubbles in a continuous single-bubble flow system, instantaneous local flow behavior was investigated in conjunction with simultaneous visual observation using a high speed video camera in a two-dimensional column. A hot-wire probe with a filament of tungsten wire having a diameter of 10 mm allowed the local convective behavior around the rising bubbles to be measured in terms of the heat transfer rate with high spatio-temporal resolution. Time series obtained with the hot-wire probe was synchronized with the visual signals to clarify the microscopic flow structure around the rising bubbles. Local turbulence was promoted when the bubble is about to either make or break contact with the tip the of the hot-wire probe. The heat transfer rate exhibited a sharp peak in the stable wake region, which contains an energetic turbulent structure providing highly chaotic motions of liquid phase generated by the oscillations in bubble shape and motions.