MXenes, the new 2D transition-metal carbides and nitrides, have recently attracted extensive attention due to their diverse applications and excellent performances. However, the thermal and electrical properties of most MXene materials are yet to be studied. In this work, we investigate the electrical and thermal properties of semiconducting Sc2CT2 (T=F, OH) MXenes using first-principles calculations. Both of the Sc2CT2 (T=F, OH) MXenes are determined to show excellent carrier mobilities. The electron mobility in the Sc2CF2 MXene is found to present strong anisotropy at room temperature, which is 5.03*10^3and 1.07*10^3 cm2V-1s-1 in the zigzag and armchair directions, respectively. The predicted electron mobility in the zigzag direction of the Sc2CF2 is nearly four-fold of that in the armchair direction of the promising semiconductor phosphorene. In contrast to Sc2CF2, Sc2C(OH)2 presents approximately isotropic electron mobility. The values at room temperature in zigzag and armchair directions are calculated as 2.06 *10^3 cm2V-1s-1 and 2.19 *10^3 cm2V-1s-1, respectively. In regard to the thermal property, the thermal conductivities of the Sc2CT2 (T=F, OH) MXenes are determined. The predicted values are higher than those of most metals and semiconducting low dimensional materials, such as monolayer MoS2 and phosphorene. Especially, the room temperature thermal conductivity along the Sc2CF2 armchair direction is determined as high as 472 Wm-1K-1 based on a flake length of 5 m, which is even higher than that of the best traditional conductor silver. The corresponding value in the zigzag direction of Sc2CF2 is calculated as 178 Wm-1K-1. The thermal conductivities in Sc2C(OH)2 is less anisotropic and lower compared to those in Sc2CF2. The room temperature value in armchair (zigzag) direction is determined as 173 Wm-1K-1 (107 Wm-1K-1). Based on the excellent electron mobilities and high thermal conductivities, both of the Sc2CT2 (T= F, OH) MXenes can be promising candidate materials for the next generation electronic devices.