Microarray chip is to fix multiple biological probes (including DNA fragments, oligonucleotides, antigens, antibodies, tissues, cells, etc.) on a special matrix (including glass sheets, nylon membranes, nitrocellulose membranes, etc.) in a pre-designed arrangement, extract biological target molecules by specific methods and label, and then specifically combine with biological probes fixed on the matrix, and then use corresponding detection equipment (such as laser scanners, CCD detectors, etc.) and analysis methods (including software) for detection, recording, analysis. Technology to enable qualitative or quantitative detection of biological target molecules.