精怪的形象與人類心理有極大相關性，大部分傳說或志怪小說中的精怪之原型，都是以真實存在於自然界的動植物或各式人造器物為本，精怪可說是結合人類想像力與創造力而生的產物。本文選擇《太平廣記》中的「木怪」與「花卉怪」兩種類型的故事作為研究範圍，試圖歸納、證明角色形象與精怪原形之間是否存在固定的關聯性。論文構成方面，第一章為前言，說明古人對精怪的定義，第二、三章分別為對木怪與花卉怪之析論，第四章為結論，說明筆者在析論植物精怪過程中所觀察到的各種現象。本文寫作目的在於比較木怪、花卉怪在形象上的差異，以及它們與人類之間的關係，並探討精怪形象的產生，是否受其身為動、植物或器物原形之影響。

The image of monsters comes from people's fantasies. In the past, Chinese people's imagination transformed everything from nature into scary monsters. A lots of stories about Chinese monsters are recorded in －＂Tai Ping Guang Chi＂－. In this essay, all the vegetable monsters are taken from －＂Tai Ping Guang Chi＂－. The first part of this essay, collects information about wood monsters and flower monsters from ancient China. Wood and flower monsters are analyzed in chapter 2 and chapter 3 respectively. The relationship between human beings and these monsters is the focus of this essay.