Yes. There is a dedicated desktop version of the LINE app. You can sign in to the same account both on a mobile phone and PC. Follow the below steps to use LINE on PC:
Register an email address on the LINE app from your smartphone.
Use LINE PC
Download the LINE desktop app for your PC by clicking here.
Launch the LINE desktop app and sign in with the same email address and password. Alternatively, you can sign in by scanning the QR code displayed on the LINE PC from your smartphone LINE app.
use LINE PC
This way, you can use the same LINE account on both PC and mobile phone.