In the Moslem Countries like Saudi Arabia, Qatar, United Arab Emirates even Brunei Darussalam etc were enacted Islamic Economy System based on sharia. Is It Possible that The Moslem Countries can accept the cryptocurrencies system in their economic system? What's your opinion?
Unofficially - yes, but publicly - no, because crypto is all about freedom, and Muslim countries tend to suppress the wish of their people for freedom.
Anyway, the countries you've listed are economically well, so I don't think their citizens are very much interested in cryptocurrencies as they have a good basic source of income provided by the state.
You are wrong here. Nowadays religion plays less and less of a role in a country's economy. For example, United Arab Emirates, mentioned in the OP, is actually a crypto friendly country. Earlier this year the Dubai Multi Commodities Center (DMCC) gave a gold trading company in Dubai the cryptocurrency trading license after which the company launched the worlds first cold storage vault for crypto. UAE even wants to play a leading role in adoption of blockchain technologies
In a bid to become a pioneer in blockchain technology, the UAE has launched the UAE Blockchain Strategy 2021, pursuant to which 50% of government transactions will be conducted using blockchain technology by 2021.
Source:
https://www.vantageasia.com/cryptocurrency-law-uae/Another example is Malaysia, predominantly Muslim country, which is very crypto friendly, unlike Bolivia, Ecuador and China (PRC), where Bitcoin is banned although they are not Muslim countries.