I used L-system to create an object and I would like to render it from angle 0 degree to 120 degree. however, I fail to render it as an animation in Houdini, just wonder if I could transfer it to maya and render in through Maya instead?

If you package up the L-system as an asset, you should be able to use it Maya through Houdini Engine. If your L-system outputs poly lines or curves, it'll be generated as curves in Maya. You can then render them in Maya.

You should be able to render them inside Houdini though. What do you mean it failed to render as an animation?