This article is focused on the review of price reduction and measuring damages under the CISG together with the law relating to sale of goods in main countries when the goods delivered did not conform with the contract. And also reviewed on the election of remedies for the aggrieved party, that is, which one between the two remedies would provide more compensation for the non-conformity. This article can be summarized as below. 1. Price reduction has its principal significance when the buyer accepts non-conforming goods and plays important role only when the seller is not liable for the non-conformity because the same price reduction formula applies for all circumstances. Of course, the buyer must bear any further damages, such as shutdown expenses and other consequential damages. 2. If the seller is liable for the damages and the price level rises, the buyer normally will claim damages since this approach is much more favorable result than price reduction. 3. In case the seller is liable for the damages and the buyer suffers no consequential damages, if the price level falls, price reduction would provide more compensation for the non-conformity than would damages and if there is no change in the market level, the allowance for defects in the goods will be normally the same under the price reduction and damages. By the way, In case the seller is liable for the damages and the buyer suffers consequential damages, it is desired that the buyer firstly elect the price reduction and later seeks to claim for consequential losses when the price level falls and unchanged.