The invention discloses a remote real-time monitoring method of a big-
bus operating status, fuel consumption and 
exhaust gas emission. The remote real-time monitoring method comprises the following steps: an online communication model is established between a 
server and a 
wireless communication module; user request information 
forms control instructions by the 
server, and the control instructions are transmitted to the 
wireless communication module through a 
router, an internet and a 
wireless network after being encrypted, and the encrypted control instructions are transmitted to a 
bus information acquisition unit through the wireless communication module; the encrypted control instructions are decrypted by the 
bus information acquisition unit, the big-bus operating status, and the fuel consumption and 
exhaust gas emission data are acquired from the CAN (Controller 
Area Network) bus of the big bus and processed, and the real-
time data is encrypted and transmitted to the wireless communication module; the encrypted real-
time data is transmitted to the 
server through the wireless communication module and decrypted through the server, the decrypted data is processed and accessed by the 
client of the user. The 
monitoring system comprises the server, the 
router, the wireless communication module installed on the big bus, the big-bus 
information acquisition unit and the power supply module.