The plant processing system of the present invention includes a plant cultivation facility (1) for cultivating a plant containing a sugar solution, a crushing facility (2) for crushing the plant cut by the plant cultivation facility (1), and the crushing facility. The squeezing facility (3) for collecting sap from the plant chip obtained in (2), the methane fermentation facility (5) for subjecting the sap to methane fermentation, and the biogas obtained by the methane fermentation facility (5) And a power generation facility (6) for generating electricity using fuel as a fuel.本発明の植物加工システムは、糖液を含む植物を栽培する植物栽培設備（１）と、前記植物栽培設備（１）で伐採された前記植物を破砕する破砕設備（２）と、前記破砕設備（２）で得られる植物チップから樹液を採取する搾汁設備（３）と、前記樹液をメタン発酵処理するメタン発酵設備（５）と、前記メタン発酵設備（５）で得られた前記バイオガスを燃料として発電する発電設備（６）とを備える。
