This standard specifies the terms, definitions, requirements, test methods, etc. of self-cleaning coatings for building exterior surfaces. Self-cleaning coatings automatically remove dust, oil and other contaminants from coating surfaces under the action of natural factors through mechanisms such as hydrophilic, hydrophobic, micronization, and photocatalysis. Mainly used for decoration and protection of building exteriors. Miscellaneous similar applications, such as bridges and tank surfaces, can also refer to this standard.