A beam loss monitoring system has been established at HLS. This paper gives
its principle and scientific grounds. Study on the ring's TBA structure an
d utilization of Monte-Carlo calculation to the shower electrons is importa
nt in its design. The system composition and performance are also introduce
d. The detector BLMs, data acquisition devices and host PC are linked via C
AN bus. This system is helpful to analyze beam loss distribution and regula
te the machine operation parameters. (C) 2001 Elsevier Science B.V. All rig
hts reserved.