**Abstract**

Indigenous knowledge systems (IKS) comprises knowledge developed within indigenous societies, independent of, and prior to, the advent of the modern scientific knowledge system (MSKS). Examples of IKS such as Ayurveda from India and Acupuncture from China are well known. IK covers diverse areas of importance for society, spanning issues concerned with the quality of life - from agriculture and water to health. The IK resident in India and China have high relevance to rural life, especially given the level of engagement with agricultural and health technologies. The goal is to establish a heuristic whereby IK can be reviewed and evaluated within particular contexts to determine if the IKS can lead to the development of appropriate technology (AT) addressing that need sustainably. Although much work on cataloguing and documenting IKS has been completed in these two countries, a paucity of attention has been paid to the scientific rationale and technological content of these IKS. Evaluation of many indigenous technologies reveal that many of these technologies can be classified as 'appropriate', focused on basic needs of water, sanitation and agriculture, and many have origins in IKS that survived. Thus, IKS must be validated, exploited and integrated into AT innovation and development.

**Keywords:** indigenous knowledge systems, modern scientific knowledge, appropriate technology, sustainable development

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