Microfluidics and microscale heat transfer are now studied experimentally and numerically for various microdevices such as micro channel in microelectronic cooling and micro transport phenomena in PEM micro-fuel cell. Measurements techniques used will be including MPIV and μLIF for velocity fields as well as thermal/concentration fields and laser holographic / or IR detector for temperature fields for liquid micro channels. Besides, flow visualization especially for channel will also be examined. Four papers for liquid channel including EOF and one paper for microfuel cell are accepted for publication in International jounals.