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when application runs on Nios, the Console pane isn'it work as the pc monitor

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This is very strange.

Do you see anything at all in the console pane?

If not, you probably missed some points from what I and pillemann suggested.

Verify the jtag uart module is correctly connected and configured in sopc builder

Verify the target connection properties in Nios IDE.

Please also erase any flash memory (epcs or parallel) possibly connected to your fpga. I had a similar behaviour once and, if I remember correctly, it was due to an epcs which I had previously programmed with a different design.

If nothing helps, rebuild the WHOLE system; I mean: regenerate sopc, compile Quartus project and rebuild Nios syslib and application. Best if you can create a new project from scratch.

Cris