Infrared camouflage refers to the capability of hiding or changing the infrared radiation characteristics, hence improving the survival rate of the objects. However, advanced multi-band detection technologies have emerged as a significant threat to the objects, necessitating the development of multi-band compatible infrared camouflage technologies. To address the challenge, it's of vital importance to clarify the camouflage requirements of different bands and design hierarchical structures based on the difference in electromagnetic response and structure size in these bands. Finally, it's essential to recognize the shortcomings of existing research and promote camouflage technologies more applicable, easy to prepare, and lower cost.