The present invention discloses a cholesterol degradation method for bird eggs, which includes: a step (a) for preparing at least one bird egg containing cholesterol； a step (b) for placing the bird egg in a solution, which is a cholesterol oxidase electrolytic buffer solution, wherein the ratio of solution volume to bird egg weight is 1:1 and the amount of enzyme contained in the solution is 3U per milliliter； and a step (c) for placing the solution in an ultrasonic device to vibrate the solution, wherein the period of vibration continues for three minutes and stops for three minutes, the process is repeated for 30 to 60 minutes, after vibrating and drying, the solution is transferred to a constant-temperature agitating tank surrounded by at least one magnetic field having a predetermined strength, and The bird eggs are agitated and degraded in the constant-temperature agitating tank for at least 16 hours, so that the cholesterol oxidase may enter the bird eggs for degrading the cholesterol in the bird eggs thereby transforming the cholesterol to choleste-4-en-3-one； and a step (d) for immersing the bird eggs in quicklime water for blocking pores of the bird eggs.本發明禽蛋膽固醇降解方法，其包括：步驟a：取至少一禽蛋，該禽蛋中含有膽固醇；步驟b：將禽蛋置入一液體中，該液體係為膽固醇氧化酶電解緩衝液，其中該液體體積與該禽蛋重量的比例為1：1，該液體中的酶含量為每毫升3U單位；步驟c：該液體係容置於一超音波裝置中，該超音波裝置震盪該液體，其震盪時間為每震盪三分鐘，停止三分鐘，重覆進行30分鐘~60分鐘，完成震盪並瀝乾後移至一恆溫攪拌槽中，該恆溫攪拌槽周圍設有至少一磁場，且該磁場具有一預定強度，該禽蛋於該恆溫攪拌槽中攪拌降解16小時以上，使該膽固醇氧化酶進入該禽蛋中，該膽固醇氧化酶降解該禽蛋中的膽固醇，使該膽固醇轉化為膽甾4烯3酮（choleste-4-en-3-one）；步驟d：將該禽蛋浸泡於生石灰水中，藉此阻塞該禽蛋的毛細孔。
