At the initial stage of beam commissioning, the turn-by-turn beam loss signals from the electron storage ring directly display the injection and accumulation of the beam. This paper introduces the types of beam loss mechanisms and enumerates several common types of beam loss monitors and their parameters. Based on the parameters of the upgrade project of the Beijing Electron Positron Collider (BEPCII) , beam loss was simulated using Geant4. The distribution of shower electrons and photons outside the vacuum chamber was analyzed. A scintillator coupled with a photomultiplier tube (PMT) monitor was chosen to detect the turn-by-turn beam loss signals. Beam tests were conducted at BEPCII, and the self-developed electronic system was used for signal acquisition and processing. To address the issue of inconsistent performance among scintillator beam loss monitors, sensitivity calibration was performed, followed by beam verification at BEPCII. This paper also introduces the signal acquisition and processing in electronics, along with the calculation and analysis of the measurement accuracy. These experiments has laid the foundation for the application of scintillation beam loss monitors in high energy photon source.