In　the　field　of　laser　engineering,　various　beam　quality　criterion　has　poor　scalability,　and　the　description　of　the　laser　spot　is　blurry.　Most　of　the　already　published　spot　quality　analyses　focus　on　the　uniformity　of　the　laser　spot,　without　considering　the　laser　spot　features.　A　generally　applicable　evaluation　system　has　not　been　established.　Follow　standardization　thinking,　an　ideal　reference　spot　model　was　established,　and　an　evaluation　method　of　laser　spot　quality　was　proposed.　With　substituting　simulation　and　experimental　images　into　calculations,　it　is　confirmed　that　this　method　can　eliminate　the　interference　from　spot　picture　inherent　attributes　like　the　number　of　pixels,　size,　and　luminance.　This　method　makes　the　spots　of　various　lasers　measurable,　especially　be　appropriate　for　evaluating　semiconductor　laser　spot,　multi-mode　fiber　spot　where　the　beam　quality　is　insufficient.