A virtual reality tracking system, comprising: a first part, comprising: a plurality of first light-emitting diodes (11, 12); and an inertial measurement unit, configured to measure an acceleration and a triaxial angular velocity of the first part; and a second part, comprising: a plurality of second light-emitting diodes (21, 22); wherein the first part and the second part are connected by a flexible component; wherein the inertial measurement unit transmits the acceleration and the triaxial angular velocity to a head-mounted display device through a transmission interface; a head-mounted display device; a first camera on the head-mounted display device captures the first light-emitting diodes (11, 12) on the first part to generate a plurality of first images; and the head-mounted display device calculates a first pose of the first light-emitting diodes (11, 12) in three-dimensional space through the first images, the acceleration, and the triaxial angular velocity; wherein the second camera on the head-mounted display device captures the second light-emitting diodes (21, 22) on the second part PB() to generate a plurality of second images; and the head-mounted display device calculates a second pose of the second light-emitting diodes (21, 22) in three-dimensional space using the second images; and wherein a first coordinate system of the first pose corresponds to the first camera; wherein a second coordinate system of the second pose corresponds to the second camera; the first coordinate system is different from the second coordinate system. a first part, comprising: a plurality of first light-emitting diodes (11, 12); and an inertial measurement unit, configured to measure an acceleration and a triaxial angular velocity of the first part; and a plurality of first light-emitting diodes (11, 12); and an inertial measurement unit, configured to measure an acceleration and a triaxial angular velocity of the first part; and a second part, comprising: a plurality of second light-emitting diodes (21, 22); a plurality of second light-emitting diodes (21, 22); wherein the first part and the second part are connected by a flexible component; wherein the inertial measurement unit transmits the acceleration and the triaxial angular velocity to a head-mounted display device through a transmission interface; a head-mounted display device; a first camera on the head-mounted display device captures the first light-emitting diodes (11, 12) on the first part to generate a plurality of first images; and the head-mounted display device calculates a first pose of the first light-emitting diodes (11, 12) in three-dimensional space through the first images, the acceleration, and the triaxial angular velocity; wherein the second camera on the head-mounted display device captures the second light-emitting diodes (21, 22) on the second part PB() to generate a plurality of second images; and the head-mounted display device calculates a second pose of the second light-emitting diodes (21, 22) in three-dimensional space using the second images; and wherein a first coordinate system of the first pose corresponds to the first camera; wherein a second coordinate system of the second pose corresponds to the second camera; the first coordinate system is different from the second coordinate system.