本文以筆者採錄於宜蘭蘇澳一則〈好阿公與壞阿公的故事〉為基礎，該故事據丁乃通先生《中國民間故事類型索引》歸為503E「狗耕田」的部份，同時比對丁先生羅列此類同型故事的其他資料，從中尋找同型故事的流傳地點，以得出該型故事大多流傳於我國稻作文化區，並進一步探討狗與稻作文化的關聯；透過卜辭、器物上的動物紋飾，分析「狗耕田」的故事中，狗之所以可以成為獎懲惡的原因。此外，宜蘭蘇澳〈好阿公與壞阿公的故事〉乃是日據時期日人「狗耕田」故事之產物，是故本文最後，乃一併對日本「狗耕田」的同型故事，從社會文化及民族的角度，提出其源自中國之佐證。

　　　　　This study is based on "Tales of Good and Bad Grandfathers" from Su-Ao, I-Lan, which were categorized by Mr. Ding. Nai-Tong as parts of 503E "Dog Cultivating Rice Field". In his An Index of Types of Chinese Folktales, Mr. Ding assembled these tales together with other same types of stores. The aim of this study is to search for the place where these types of tales spread, thereby confirming that they were mostly popular in our country's rice culture region. Further, the study will investigate the association between dogs and rice culture; through deciphering Shang Dynasty's oracle inscriptions on animal bones, this study will also analyze the reason why a dog becomes the vehicle for rewarding gook and punishing evil. As these tales spread from Mainland China to Japan nearby, this study will close with an exploration of Japanese version of the same type. Looking from the perspective of society, culture, and ethnicity, it proves the undeniable influences Chinese origin has had on its Japanese counterpart.