An ion filter life perception device for a fuel cell vehicle is provided to detect a replacement life of a fuel cell ion filter cartridge. The device includes a body part that is installed within an ion filter and has an ion resin filled therein. A checker is disposed within the body part and has a varying position based on a volume of the ion resin. In addition, an elastic member is disposed between a first side end in the body part and the checker to push the checker within the body part by elasticity.