a long position in a call option  means  long the underlying asset.
long position in a option means you are ,enter into a contract, have the right but not the obligation to buy the underlying asset in a predetermined price on a specified future date.

     "那么衍生品证券里面的多头空头是以买入或卖出衍生品证券来判断空头多头呢还是以日后买入卖 出资产来判断是属于多头还是空头呢？"

衍生品证券，衍生品证券价值变动方向 与 underlying asset 可同可不同，具体要看合约种类：
eg1： a long position in a future contract  means long the underlying asset.
eg2： a long position in a option means you just 持有了一份期权，是否 long the underlying asset 要看合约种类。

很基础的问题