and quantitative scanning analyses for the array spots 71 on the biochip 70 that have gone through interaction washing and drawing operations it has an inlet 41 to receive the biochip 70 the reading device 40 may be a optical transmittant or reflective scanner 42 depending on the nature of the substrate and film property of the biochip 70 in addition the positioning device 10 the mixing device 20 the drawing device 30 and the reading device 40 are mounted on a device body 50 the device body 50 has at least one control panel 51 located on a surface thereof for controlling all other devices and at least one connection slot 52 for linking to a computer or other operation systems to process control and data analysis the connection slot 52 may be a parallel transmission port or a series transmission port such as rs 232 or usb interface moreover the device body 50 has at least one housing cavity 53 corresponding to two sides of the positioning device 10 for housing a container for holding reagents and the sample solution 80 when in use first adding biological probes 72 on the biochip 70 encased in the chip cartridge 60 or inserting the.