La2Ce2O7 ceramics co?activated by Ho3+ and Yb3+ were synthesized by high temperature solid?state reac? tion. Both Ho3+ and Yb3+ substitute the La3+ sites in the La2Ce2O7 lattice, where the Ho3+ concentration is 0.05% at.% and the Yb3+ concentration varies in the range of 10% ~ 18% at.%. Pumped by a 980 nm laser, the up?conversion (UC) green emission peaked at 550 nm and the red emission at 666 nm were detected. When the doping concentration of Ho3+ and Yb3+ are 0.05% at.% and 14% at.%, respectively, the UC emission reaches the strongest intensity. Temperature sensing performance of La2Ce2O7∶Ho3+ / Yb3+ was studied in the temperature range of 303 ~ 483 K, the highest absolute sensitivity (Sa) is 0.002 8 K-1 at 303 K and the highest relative sensitivity (Sr) is 0.005 4 K-1 at 303 K. The results show that the ce? ramics La2Ce2O7∶Ho3+ / Yb3+ can be a potential candidate for remote temperature sensors.