To measure the beam position and closed orbit of the electron storage ring at the Hefei Advanced Light Facility (HALF), a button-type Beam Position Monitor (BPM) was designed and tested. Firstly, the design of the button-type BPM for HALF was carried out based on the requirements of the beam position measurement system, focusing on materials, geometric structures, etc. Then, theoretical analysis and calculations were conducted on the designed BPM to obtain information such as position sensitivity and mapping. Finally, calibration tests were performed on the machined prototype of the BPM for the HALF pre-research project. The measurement sensitivity and mapping of the BPM were obtained, reducing the nonlinearity of the BPM itself, eliminating installation errors of BPM components, and providing data references for eliminating online errors. The results indicate that the designed button-type BPM meets the beam position measurement requirements of HALF.