The main objective of this research is to analyze the performance of micro direct methanol fuel cell (£gDMFC) and observe the bubble behavior of carbon dioxide in the anode flow channel. The flow plate adopted in this study was manufactured through deep UV lithography manufacturing and micro-electroforming manufacturing process. The geometrical configuration of the flow field is in the serpentine form. Transparent acrylic (PMMA: Polymethylmethacrylate) was used to make the terminal plate placed on both sides of the cell in order to facilitate the observation of the bubble behavior of carbon dioxide in the anode flow channel. In this experiment, Micro Particle Image Velocimetry (£gPIV) is used in order to investigate the generation / removal process of carbon dioxide from the anode of micro direct methanol fuel cell (£gDMFC) through a visualized observation method. The behavior of carbon dioxide bubbles in liquidized methanol solution and micro flowfield is also explored. Major parameters of the experiment operation that consist of flow rate of anode and cathode, density of methanol and operational temperature are used to explore their influences on the fuel cell¡¦s polarization curve and power density. The results are presented by V-I curve and P-I curve. The relation between carbon dioxide bubble movement and behavior according to the anode pressure drop are also discussed.