A bearing device (10) for a motor (12) includes a bearing set (20) and a shaft (14). The bearing set includes first and second bearings (21, 26), which are made of sintered metallic material and ceramic material respectively. An annular recess (24) is defined in one end of the first bearing. The second bearing is received in the recess. Each bearing defines a central hole (22, 27). The central holes have a same diameter. The motor includes a rotor (30), a stator (32), and a bearing sleeve (34). In assembly, one end of the shaft is fixed in a center of the rotor. The second bearing is inserted into the recess. The bearing set is fixed within the bearing sleeve. The stator is fixed around the bearing sleeve. The shaft is rotatably received in the central holes. During operation, the shaft rotates smoothly and stably in the bearing set.