Abstract: A quasi-real-time monitoring system was built based on FBG demodulation system and embedded Web server, which can realize remote transmission and access of spectral data. The overall design used the STM32 as a control chip. Moreover, FBG sensor and demodulation system, ENC28J60 Ethernet controller, data transmission adopted a common TCP/IP protocol, and STM32 system ported LwIP (Light Weight IP) protocol to achieve Web services remote spectrum monitoring. The design has a certain versatility and application value.