PROBLEM TO BE SOLVED: To provide a liquid detection system having a simpler and more compact structure, having a self electric power generation function, and capable of more accurately detecting leakage of a liquid, etc.SOLUTION: In the liquid detection system 10, a sensor structure 11 includes: a detection part 21 having a first surface 15, a second surface 16 located on the opposite side from the first surface and an opening 14 for detecting the liquid located on the first surface 15 and an electric power generating part 22 having a water battery with the liquid as a catalyst. A liquid detection element 24, a part of which is exposed from the opening 14, is disposed in the detection part 21.COPYRIGHT: (C)2013,JPO&INPIT【課題】より簡易かつコンパクトな構造であって、自己発電機能を有し、より高精度に液体の漏れ等を検知することのできる液体検知システムの提供。【解決手段】センサ構造体11は、第1面15及びその反対側に位置する第2面16と、開口部14を有し、第1面側15に位置する液体を検知するための検知部21と、液体を触媒とする水電池を有する発電部22とを含み、検知部21には開口部14からその一部が露出する液検知素子24が配置されている液体検知システム10。【選択図】図1