In　this　paper,　we　make　the　first　attempt　to　investigate　the　Cauchy　problem　of　a　shallow　water　model,　namely,　the　inviscid　lake　equations,　in　the　Besov　spaces.　Notably,　we　prove　the　global　existence　and　uniqueness　of　the　solutions　in　the　Besov　spaces　Bp,qs(Double-struck　capital　R2)$$　{B}_{p,q}　circumflex　s\left({\mathbb{R}}　circumflex　2\right)　$$　for　s＞2p+1$$　s　＞\frac{2}{p}+1　$$　and　s=2p+1$$　s　equal　to　\frac{2}{p}+1　$$　if　q=1$$　q　equal　to　1　$$,　which　contain　the　particular　case　of　the　endpoint　Besov　space　B　infinity,11(Double-struck　capital　R2)$$　{B}_{\infty,　1}　circumflex　1\left({\mathbb{R}}　circumflex　2\right)　$$.