What is the difference between negative and positive count in inventory field.?

Well negative inventory refer to losses and positive inventory is favorable to the company but this is most common mistakes on receiving and dispatch if you are sure that your actual count is 100% percent correct. 

If your inventory count is more than book valve it's positive inventory and vise versa

With a positive inventory, the physical stockpile exceeds the book value, while a negative inventory shows the opposite redactle

Negative we can define as shortage of item during physical count and positive we can define as excess of product during counting of inventory