The declaration of the qualification certificate of China's equipment installation, operation and maintenance enterprises needs to meet a series of conditions and requirements to ensure that the enterprise has the corresponding ability and qualification to engage in equipment installation, operation and maintenance business. The following are the conditions and requirements that enterprises need to meet to apply for the qualification certificate of equipment installation, operation and maintenance enterprises in China:
First, the basic conditions.
1.Enterprises must have independent legal personality and be able to independently bear civil liability.
2.Enterprises must have a fixed business premises and necessary equipment and facilities to meet the needs of equipment installation, operation and maintenance.
3.Enterprises must have a corresponding number of professional technical and management personnel, with the corresponding technical strength and management capabilities.
4.Enterprises must have a good credit record and business performance, and be able to ensure service quality and business stability.
Declaration Procedure. 
1.Enterprises need to understand the specific conditions and requirements for applying for qualification certificates, and determine the level of declaration and the required supporting materials.
2.Enterprises need to follow the prescribed procedures to declare, including filling in the application form, submitting supporting materials, etc.
3.After the declaration is completed, the enterprise needs to wait for the review and evaluation of the relevant departments, and only after the audit is passed can the corresponding qualification certificate be obtained.
Supporting materials. 1.Enterprises need to provide basic certificates such as business licenses and tax registration certificates to prove the legal business qualifications of the enterprise.
2.Enterprises need to provide professional and technical personnel title certificates, skill certificates and other supporting materials to prove that the enterprise has the corresponding technical strength.
3.Enterprises need to provide business performance reports, customer evaluations and other supporting materials to prove the company's business performance and service quality.
4.Enterprises need to provide other necessary supporting materials, such as equipment lists, technical solutions, etc., to prove that the enterprise has the corresponding capabilities and conditions.
In short, the declaration of qualification certificate for equipment installation, operation and maintenance enterprises in China requires enterprises to have certain conditions and capabilities, including basic conditions, qualification levels and standards, application procedures and supporting materials. Enterprises need to carefully understand the declaration conditions and requirements, declare in accordance with the prescribed procedures, and provide complete supporting materials to ensure that the corresponding qualification certificate is successfully obtained.