| Cover | Apr. 19, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Apr. 19, 2022 |
| Entity File Number | 001-34625 |
| Entity Registrant Name | SMART POWERR CORP. |
| Entity Central Index Key | 0000721693 |
| Entity Tax Identification Number | 90-0093373 |
| Entity Incorporation, State or Country Code | NV |
| Entity Address, Address Line One | 4/F, Tower C |
| Entity Address, Address Line Two | Rong Cheng Yun Gu Building |
| Entity Address, Address Line Three | Keji 3rd Road, Yanta District |
| Entity Address, City or Town | Xi’an City, Shaanxi Providence |
| Entity Address, Country | CN |
| Entity Address, Postal Zip Code | 710075 |
| City Area Code | (86-29) |
| Local Phone Number | 8765-1097 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $0.001 per share |
| Trading Symbol | CREG |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
