The invention relates to a blind person navigation assistant device based on 
the internet. The blind person navigation assistant device comprises a wristwatch body, wherein a 
laser distance measuring sensor module, a 
single chip microcomputer, a 
Bluetooth chip module, a GPRS communication module, a 
GPS positioning module, a voice module, an alarming module and an 
image acquisition module are built in the wristwatch body, the 
single chip microcomputer is electrically connected with the 
laser distance measuring sensor module, the 
Bluetooth chip module, the GPRS communication module, the 
GPS positioning module, the voice module, the alarming module and the 
image acquisition module, and the 
Bluetooth chip module, the GPRS communication module, the 
GPS positioning module and the 
image acquisition module respectively transmits signals with the 
single chip microcomputer mutually. By adopting the blind person navigation assistant device, real-time 
road condition detection can be performed by arranging the GPS positioning module, the 
laser distance measuring sensor module and the image acquisition module in the wristwatch, and voice reminding and alarms at any time can be given by adopting the voice module and the alarming module. In addition, the blind person navigation assistant device is matched with a guiding 
walking stick in use, makes a blind person more convenient and 
safer in outgoing in life and makes family members of the blind person feel more relieved.