It is said that on the moon live a beauty and a rabbit 另一個說法是不是 On the moon is said to live a beauty and a rabbit?

另一個說法應是：A beauty and a rabbit are said to live on the moon.
On the moon live a beauty and a rabbit.是倒裝句，真正的主詞在後面，前面的on the moon是主詞補語。你寫的方式不對。

不是
It is said 其實是一個客觀地指明某件事，沒有指自己，或是誰去講某件事

你的句子
On the moon is said to live a beauty and a rabbit中
"On the moon" 是狀語，因此句子欠缺了主語Subject，文法不對

另一個說法可寫作
People believe there is a beauty and a rabbit living on the moon.
A beauty and a rabbit live on the moon.