This paper presents pre-launch testing and calibration results for the Space-based multi-band Variable Objects Monitor, Visible Telescope Flight Model, validating its performance under simulated space conditions through thermal vacuum cycling, energy concentration analysis, stray light suppression, and CCD/electronics calibrations (gain, noise, quantum efficiency). The results confirm full compliance with design requirements: stray light suppression achieves point-source transmittance <10−7 at 30° off-axis, thermal control maintains stable CCD temperatures (−75°C for the red channel, −65°C for the blue channel), and detection sensitivity meets the limiting magnitude of 22.50 (SNR > 3 with 300 s exposure). Early in-orbit tests further validate performance, yielding limiting magnitudes of 22.70 (V-band, red) and 22.78 (blue), consistent with pre-launch specifications.