Abstract: As a crucial part of particle accelerator control system, Lattice Server middlelayer serve as a bridge between the high-level physics application and accelerator physics. According to Hefei Advanced Light Factory’s (HALF) demands, we have carried out a research of lattice middlelayer technology in the HALF pre-research project, and developed the Lattice Server program for beam optical parameter measurement in Python. To verify the Lattice Server frame’s practicability, we developed a set of beam optical parameter measurement applications based on Python for Hefei Light Source II (HLS-II). The results of the beam optical parameter measurement are accurate, which indicate that the Lattice Server middlelayer realized the interaction between the high-level applications and accelerator control system, and the Lattice Server frame is practical.