This article is a case study. It was intended to make clear how agricultural production of noble family(the Nam's family) was responded to the climate of the 17th-century Little Ice Age(an integration analysis of climate and agriculture). So, with focusing on the climatic records of the Byung-ja-il-gi 《丙子日記》, it can be understood that the climatic pattern and phenomena shown in the Byung-ja-il-gi is almost the same as so-called that of the 17th-century Little Ice Age: 'low temperature', 'long-lasting drought', 'its following intensive flood', etc. Under such a natural-environmental condition, agricultural production could not help being adapted without any choice(for example: the seedtime change, etc). Through analyzing the yield from 'I-an'(利安) rice paddy, it is estimated that approximately, only 39.95% of the anticipated total farm output might be sent to the landlord in Seoul in spite that almost all the farm works were done by in-house-servant from February 15th to May 26th in 1638 and all the required seeds were also offered by landlord(and besides, production index per sowing, '15.67', was obtained well within accepted levels). At the first glance, it comes to know how much the climate(natural environment) influenced the agricultural production. There might be a little difference, but this situation under the same climatic condition might be all the same all over the country. The very situation drove even Madam 'Nam-pyung'(南平) ‘Jo'(曺氏) of the Nam's family, one of top noble families of the time, who probably owned several hundreds of servants and nationwide land over 24 regions to feel nervous about her own living. Such a poor situation can be easily understandable through her honest record: "worrying about poverty again."